To solve the system of equation below zach isolated X^2 in the first equation and then substituted into the second equation. What was the resulting equation

{x^2 + y^2 = 25
{x^2/16 - y^2/9 = 1

Answers

Answer 1

The resulting equation of isolation and substitution is  9y⁴-466 y² + 5481 = 0

How to get the resulting equation?

Given:

{x² + y² = 25

{x²/16 - y²/9 = 1

Zach isolated  x² in the first equation, we have:

x² + y² = 25

x² = 25- y²

Zach then substituted the x² into the second equation:

x²/16 - y²/9 = 1                           (put x² = 25- y²)

(25- y²)²/16 - y²/9 = 1                (Expand the bracket)

(625- 50y²+y⁴)/16 - y²/9 = 1      The LCM of 9 and 16 is 144

( 9(625- 50y²+y⁴) - 16 y² ) /144 = 1         Cross multiply

9(625- 50y²+y⁴) - 16 y² = 144

5625 - 450y² + 9y⁴-16 y² = 144

9y⁴-466 y² + 5625 = 144

9y⁴-466 y² + 5625-144 = 0

9y⁴-466 y² + 5481 = 0  

Therefore, the resulting equation is  9y⁴-466 y² + 5481 = 0

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Related Questions

The graph shows the percentage of citizens in a certain country who trust in their government. Complete parts a through c below.
Could someone please explain how to do part B. and C. in depth, thanks.

Answers

If the given equation is y-25=-0.92(x-4). The equation in the slope-intercept form is y=-0.92x+28.68.

What is a linear equation?

It is defined as the relation between two variables, if we plot the graph of the linear equation we will get a straight line.

If in the linear equation, one variable is present, then the equation is known as the linear equation in one variable.

The given equation is,y-25=-0.92(x-4)

The slope-intercept form of the equation is,

y=mx+c

m is the slope and c is the intercept.

Thus if the given equation is y-25=-0.92(x-4). The equation in the slope-intercept form is y=-0.92x+28.68.

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Identify the function shown in this graph.

A. y= 3x - 3
B. y= -3x + 3
C. y= -3 x- 3
D. y= -1/3x + 3​

Answers

The answer:
It’s C
y=-3x-3

The formula D = 5e -0.1h
can be used to find the number of milligrams D of a certain drug that is in a patient's
bloodstream h hours after the drug was administered. When the number of milligrams reaches 3, the drug is to be
administered again. What is the time between injections?

Answers

By Computing the Logarithmic Relation, we calculate that the time between injections is 5.1 hours or 5 hours and 6 minutes.

The given formula is

[tex]D = 5e^{-0.1h}[/tex]

where D is the amount of drug in milligrams in the patient's bloodstream and h is the number of hours after the drug was administered.

So, it is given that D = 3 and we need to evaluate the number of hours it took between the injections,

So, We have,

[tex]D = 5e^{-0.1h}[/tex]

[tex]\frac{D}{5} = e^{-0.1h}[/tex]

Taking Natural log on both sides, we have :

[tex]ln\frac{D}{5} =ln e^{-0.1h}\\\\ln\frac{D}{5} = -0.1h\\[/tex]

We have D = 3, putting it in the formula, we get

[tex]\ln\frac{3}{5} = -0.1h\\\\ln(0.6) = -0.1h\\\\-0.5108 = -0.1 h\\\\h = \frac{0.5108}{0.1} = 5.1[/tex]

Hence, the time between injections is 5.1 hours or 5 hours and 6 minutes.

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Let f(x) = -4x + 3 and g(x) = 6+ 7x Find the function. f/g (f/g)(x) =

Answers

The solution of the composite function (f/g)(x) is [tex]\frac{-4x+3}{6+7x}[/tex]

How to solve composite function?

Composite functions are when the output of one function is used as the input of another.

In other words, a composite function is generally a function that is written inside another function.

Composite function involves the composition of functions is combining two or more functions as a single function.

Therefore, let's solve the function below:

f(x) = -4x + 3

g(x) = 6 + 7x

Hence,

(f/g)(x) = f(x) / g(x)

Therefore,

f(x) / g(x) = [tex]\frac{-4x+3}{6+7x}[/tex]

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Michael was assigned math problems to complete for his weekly homework. So far, he has completed 28 problems, which is of the total number of math problems he was assigned. How many 2/7 total math problems was Michael assigned for homework?

Answers

Michael was assigned a total of 98 task which a fraction of 2/7 is 28

Fractions

A fraction represents a part of a whole or, more generally, any number of equal parts. When spoken in everyday English, a fraction describes how many parts of a certain size there are, for example, one-half, eight-fifths, three-quarters.

Data;

Fraction completed = 2/7Number completed = 28Number of problem = x

We can find the number of problem as

28 = 2/7 * x

7 * 28 = 2x

x = 98

The number of task assigned is 98.

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If 49% of the people in a community use the emergency room at a hospital in one year, a sample of 11 people use the emergency room. Find the probability of more than 5 people use the emergency room.

Answers

The probability of more than 5 people using the emergency room is 0.4729

How to find the probability of more than 5 people who use the emergency room?

Since 49% of the people in a community use the emergency room at a hospital in one year, a sample of 11 people use the emergency room. To find the probability of more than 5 people use the emergency room, we use binomial probability.

What is binomial probability?

We find that the binomial probability of x is   P(X = x) = ⁿCₓpˣ(1 - p)ⁿ⁻ˣ

where

n = number of total trialsp = probability of event andx = number of required trials

Since

n = 11, p = 49% = 0.49 and x = 5,

Let us now find the probability of x ≤ 5.

So, P(X ≤ 5) = ¹¹C₀p⁰(1 - p)¹¹⁻⁰ + ¹¹C₁p¹(1 - p)¹¹⁻¹ + ¹¹C₂p²(1 - p)¹¹⁻² + ¹¹C₃p³(1 - p)¹¹⁻³

+ ¹¹C₄p²(1 - p)¹¹⁻⁴ + ¹¹C₅p⁵(1 - p)¹¹⁻⁵

So, substituting the values of the variables into the equation, we have

= ¹¹C₀(0.49)⁰(1 - 0.49)¹¹ + ¹¹C₁(0.49)¹(1 - 0.49)¹⁰ + ¹¹C₂(0.49)²(1 - 0.49)⁹ + ¹¹C₃(0.49)³(1 - 0.49)⁸

+ ¹¹C₄(0.49)⁴(1 - p)⁷ + ¹¹C₅(0.49)⁵(1 - 0.49)⁶

= (1)(1)(0.51)¹¹ + (11)(0.49)(0.51)¹⁰ + (55)(0.49)²(0.51)⁹ + (165)(0.49)³(0.51)⁸

+ (330)(0.49)⁴(0.51)⁷ + (462)(0.49)⁵(0.51)⁶

= 0.0006071 + (11)(0.49)(0.0011904) + (55)(0.2401)(0.0023341) + (165)(0.117649)(0.0045768)

+ (330)(0.0576480)(0.0089741) + (462)(0.0282475)(0.0175963)

= 0.0006071 + 0.0064163 + 0.0308230 + 0.0888452

+ 0.1707218 + 0.2296378

= 0.5270512

≅ 0.5271

So, P(X ≤ 5) = 0.5271, we see that the binomial probability of more than 5 people is P(X ≥ 5) = 1 - P(X ≤ 5)

So, substituting the value of the variable into the equation, we have

= 1 - 0.5271

= 0.4729

The probability is 0.4729

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calculate the surface area of a cube that has a width of 25 centimeters

Answers

The surface area of a cube that has a width of 25 centimeters is 3750 cm².

What is surface area?

It should be noted that surface area simply implies the measure of the total area that the surface of an object occupies.

In this case, the surface area of a cube is measured as 6a² where a = side

In this case, the side is 25. Therefore, the surface area will be:

= 6a²

= 6 × 25²

= 3750 cm²

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A copy machine makes 32 copies per minute. How long does it take to make 136 copies?

Answers

Answer:

4.25 minutes

Step-by-step explanation:

[tex]\frac{32 \:copies}{1\:min} = \frac{136\: copies}{x \: min} \\\\x\: min = \frac{136 \: copies}{32 \: copies} \\\\x=4.25 \: min[/tex]

Answer: 4 mins 15 seconds (4.25 mins)

Step-by-step explanation:

136 copies/32 copies per minute = 4.25 minutes

So we know it will take 4.25 mins. 4.25 mins is equal to 4 mins and 15 seconds.

At 6 AM today, you purchased 1 MW of electricity contract for 12 PM at a price of 100 pounds/MWh. Two hours later, the forecast for solar generation for 12 PM has changed from 4 GW to 4.5 GW. The market is currently bid at 95 pounds/MWh and offered at 105 pounds/MWh. What would you do, and why?

Answers

After 2 hours the plan needs to be changed, and purchase solar for the cost effect.

What is unit conversion?

It is defined as the conversion from one quantity unit to another quantity unit followed by the process of division, and multiplication by a conversion factor.

It is given that:

At 6 AM today, you purchased 1 MW of electricity contract for 12 PM at a price of 100 pounds/MWh.

Total cost = 6x100 = 600 pounds

Total cost for 2 hours = 200 pounds

Two hours later, the forecast for solar generation for 12 PM has changed from 4 GW to 4.5 GW.

Total cost for this:

From 8 AM to 12 PM = Number of hours 4 hours

4.5 GW = 4500 MW

= 105 pounds/MWh

Total cost for  4 hours = 630 pounds for 4500 MW per hour

Thus, after 2 hours the plan needs to be changed, and purchase solar for the cost effect.

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I’m really stuck on how to answer this question I need help

Answers

The answer is 252m
You work this out by using the equation:
SA: 2(LW + LH + WH)
And just substituting in the values :)

Frank makes $320 a week. If he works more than 8 hours in a day, he gets paid $10 for each hour of overtime. What did Frank earn if he worked 9 hours on 3 days last week?

Answers

Answer:

$55.71

Step-by-step explanation:

$320/7=$45.71 per day

45.71/8=5.71 per hour

45.71+10=$55.71 for 9 hours of work

45.71+ 45.71+55.71 =$147.13 for 3days +1 hour overtime

Jane bought 4 paintbrushes for $7
The ratio of paintbrush to follar is 7-4
The ratio if dollars to paintbrushes is 7:11
The ratio of dollars to paintbrushes is 7:4
The ratio of paintbrushes to dollars is 4-7
The ratio of dollars to paintbrushes is 4 to 11
The ratio of paintbrushes to dollars is 4:7

Answers

The ratio of dollars to paintbrushes is 7:4

What is a ratio?

A ratio expresses the number of times one value is contained in another value.

The number of paintbrushes Jane bought for $7 is 4

From the question, 4 paintbrushes can be bought with $7 (7 Dollars), therefore, seven dollars gives 4 paintbrushes

The ratio of dollars to paintbrushes is therefore 7 to 4, while the ratio of paintbrushes to dollars is 4 to 7

The expression for ratio is the colon symbol ':'

Ratios can also be expressed using the word 'to'.

A ratio can also be expressed using the hyphen '-'

The ratio of paintbrushes to dollars can be expressed as 4:7 or 4 to 7 or 4-7.

The correct option is therefore;

The ratio of Dollars to paintbrushes is 7:4.

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Answer:

The ratio of paintbrushes to dollars is 4 to 7.

 The ratio of dollars to paintbrushes is 7:4.

 The ratio of paintbrushes to dollars is 4:7.

Step-by-step explanation:

it just is


2) Bethany, a pilot with a commercial airline, flew from NY to Pittsburgh and back. It took % hours to get to
Pittsburgh. With the help of the jet stream, the return trip took only 4/5 the time. How long was the round trip?

Answers

Total time taken by Bethany to make a round trip of NY to Pittsburgh as per  given conditions is equal to 1 (7/ 20)hours.

As given in the question,

Time taken by Bethany to flew from NY to Pittsburgh is equal to 3/4 hours

Now using jet stream ,

Time taken by airlines from Pittsburgh to NY is (4/5) th of (3/4) hours

= (4/5) × (3/4) hours

= 3/5 hours

Total time taken by airlines to make a round trip from NY to Pittsburgh is given by:

= [(3/4) + (3/5)] hours

= [(15 +12)/20] hours

= 27/20 hours

= 1 7/20 hours

Therefore, total time taken by Bethany to make a round trip of NY to Pittsburgh as per  given conditions is equal to  1 (7/ 20)hours.

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All families in a given nation with four children were asked to report the sexes of the children.
What percent of families would be expected to have children who are all boys? Write your answer as an exact percentage.

Answers

The percent of families would be expected to have children who are all boys is 6.25%

How to calculate percentage?

The following can be illustrated:

all 4 boys BBBB 1 1/16

3 boys 1 girl BBBG,GBBB,BGBB,BBGB 4 4/16

2 boys 2 girl BBGG,BGBG,GBGB,BGGB,GBBG, GGBB 6 6/16

1 boy 3 grisl BGGG,GBGG,GGBG,GGGB 4 4/16

all 4 girls GGGG 1 1/16

Therefore, the percent of families would be expected to have children who are all boys will be:

= All boys × 100

= (1/16)*100

= 6.25%

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Draw and label the following figure.


Isosceles obtuse triangle with the obtuse vertex is angle T.

Answers

The Isosceles obtuse triangle in which the obtuse vertex is angle T is represented with the attached diagram.

What is an isosceles obtuse triangle?

An isosceles obtuse triangle is a type of triangle which is formed by two equal sides of the triangle.

The vertex angle, which will be the obtuse one (x) can be x > 90°.The sum of the two base angles, y1 and y2, can be represented by y1 + y2 < 90 degrees.

As long as the measures of the angles add up to 180°, it is an isosceles obtuse triangle.

An obtuse angle is an angle greater than 90 degrees but less than 180 degrees.

A triangle is a polygon with three sides and three angles. There are different types of triangle, which includes:

Equilateral triangleScalene triangleObtuse triangleIsosceles triangleRight angle triangle

So therefore, an isosceles obtuse triangle is formed by having two equal sides of a triangle.

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Ordered pair for 2x+3y=5x-y

Answers

It seems like it’s X=4y/3

011 (part 1 of 2) 10.0 points
Young David, who slew Goliath, experi- mented with slings before tackling the gi- ant. He found that with a sling of length 0.566 m, he could revolve the sling at the rate of 10.7 rev/s. If he increased the length to 0.87 m, he could revolve the sling only 7.7 rev/s.
a) What is the larger of the two linear speeds?Answer in units of m/s.

part 2
b) Using the sling length 0.87 m, what is the centripetal acceleration at 7.7 rev/s?
Answer in units of m/s2.
this is physics

Answers

The 0.566 meter, 0.87 meter, 10.7 rev/s and 7.7 rev/s radii and respective rotational speeds of young David's slings indicates.

a) The larger linear speed is 42.09 m/s

b) The centripetal acceleration of the sling at 7.7 rev/s is approximately 2,036.39 m/s²

What is a linear speed?

A linear speed is a measure of the rate at which the distance traveled by an object in rotary motion changes with time.

When the length of the sling = 0.566 m, The rate of revolving of the sling = 10.7 rev/s

When the length of sling = 0.87 m, the rate of revolving the sling = 7.7 rev/s

Linear speed = Angular speed ×Radius length

The angular speed when the length of the is 0.566 m, ω₁, is found as follows;

One complete 360° rotation  = 2·π radians

ω₁ = 10.7 rev/s × 2·π ≈ 67.23 rad/s

The linear speed is; v₁ ≈ 67.23 rad/s × 0.566 m ≈ 38.05 m/s

The angular speed when the length is increased to 0.87 meters is therefore;

ω₂ = 7.7 rev/s × 2 × π ≈ 43.38 rad/sec

The linear speed is; v₂ ≈ 43.38 rad/s × 0.87 m ≈ 42.09 m/s

The larger of the two linear speed is approximately 42.09 m/s

Part 2: The centripetal acceleration, [tex]a_c[/tex], is found using the following formula;

[tex]a_c = \dfrac{v^2}{r}[/tex]

When the radius is r = 0.87 meters, the linear speed v₂ ≈ 42.09 m/s, which indicates;

[tex]a_c=\dfrac{42.09^2}{0.87} \approx 2,036.39[/tex]

The centripetal acceleration is approximately [tex]a_c[/tex] ≈ 2,036.39 m/s²

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Draw and label the following figure.


Scalene Right triangle RGH.

Answers

The scalene right triangle RGH is given by the image shown at the end of the answer.

What are the classification of triangles?

There are two classifications of triangles, either regarding the side lengths or the angles.

Regarding the side lengths, the classifications are given as follows:

Scalene: Three different side lengths.Isosceles: Two equal side lengths.Equilateral: Three equal side lengths.

Regarding the measure of the greatest angle, the classifications are given as follows:

Acute: The greatest angle has a measure that is less than 90º.Straight: The greatest angle has a measure that is exactly 90º.Obtuse: The greatest angle has a measure that is greater than 90º.

In this problem, RGH is a scalene right triangle, hence:

The three sides have different lengths.There is an angle of 90º on the triangle.

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What is the leading coefficient of the following polynomial function have?
ƒ (x) = 5x² + 3x³ + 2x^5 + 3x

Answers

Answer:

Step-by-step explanation:

2

Answer:

The leading coefficient is 2.

Step-by-step explanation:

Leading coefficients are the numbers with the highest degree or exponent.

On rectangle ABCD below, if A is located at (3,4) and B is located at (7, 6), what is the slope of BC?

Answers

If A is located at (3,4) and B is located at (7,6) , then the slope of BC is -2  .

In the question ,

it is given that ,

In the rectangle ABCD , the coordinate of the point A is (3,4) and the coordinate of the point B is (7,6) .

since the sides of the rectangle are at 90° , that means they are perpendicular .

which means AB⊥BC ,

the slope of AB = (6-4)/(7-3)

slope = 2/4

slope = 1/2

Since , AB⊥BC ,

(slope of AB)×(slope of BC) = -1

substituting the values , we get

(1/2)×(slope of BC) = -1

slope of BC = -1/(1/2)

slope of BC = -2 .

Therefore , If A is located at (3,4) and B is located at (7,6) , then the slope of BC is -2  .

The given question is incomplete , the complete question is

On rectangle ABCD, if A is located at (3,4) and B is located at (7, 6), what is the slope of BC ?

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evaluate: p2(square) +3q2(square). p= -1/2. q= -2​

Answers

Answer:

12 [tex]\frac{1}{4}[/tex]

Step-by-step explanation:

substitute the given values for p and q into the expression

p² + 3q²

= (- [tex]\frac{1}{2}[/tex] )² + 3(- 2)²

= [tex]\frac{1}{4}[/tex] + 3(4)

= [tex]\frac{1}{4}[/tex] + 12

= 12 [tex]\frac{1}{4}[/tex]

Housing value are appreciating at a rate of 11.3% a year how much will your 810,000 house be worth in 5 years if this rate of appreciation continues

Answers

[tex]\qquad \textit{Amount for Exponential Growth} \\\\ A=P(1 + r)^t\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{initial amount}\dotfill &810000\\ r=rate\to 11.3\%\to \frac{11.3}{100}\dotfill &0.113\\ t=\textit{years}\dotfill &5\\ \end{cases} \\\\\\ A=810000(1 + 0.113)^{5} \implies A=810000(1.113)^5\implies A \approx 1383441.63[/tex]

...........................................PLEASE HELP ME

Answers

24 month is 2 years so it would be 6% interest in total
So 1% of 3000 is 30
So 6% of 3000 is 180
180 + 3000 = 3180

Answer:

They should pay AED 180 as interest.

Step-by-step explanation:

Simple interest:

        P = The amount borrowed = AED 3000

        R = rate of interest = 3% per year

       t = time = 24 months = 24 ÷ 12 = 2 years

          [tex]\sf \boxed{Interest = PRt}[/tex]

Substitute the values,

                            [tex]\sf = 3000 * \dfrac{3}{100}*2\\\\ = 30*3*2\\\\=AED \ 180[/tex]

is 160,80,40,20 a arithmetic sequence or a geometric sequence or neither

Answers

The given sequence160,80,40,20 is the geometric sequence.

In an Arithmetic sequence, the difference between the two consecutive terms is equal.

In a Geometric sequence, the common ratio of the two consecutive terms is equal.

The given sequence is 160, 80, 40, 20

Now,

[tex]T_{1} = 160\\T_{2} = 80\\T_{3} = 40\\T_{4} =20[/tex]

Subtracting the consecutive terms to calculate the common difference,

[tex]d = T_{2} -T_{1} = 80 -160 = -80[/tex]

[tex]T_{3} -T_{4} = 40 -80 = -40[/tex]

So, [tex]T_{2} -T_{1} \neq T_{3} -T_{4}[/tex]

So, the given sequence is not an arithmetic sequence.

Now, Calculating the common ratios,

[tex]r = \frac{T_{2} }{T_{1} } = \frac{80}{160} = \frac{1}{2}[/tex]

and, [tex]r =\frac{T_{3} }{T_{2} } = \frac{40}{80} = \frac{1}{2}[/tex]

Hence, the ratio is the same for consecutive terms.

So, the given sequence is the geometric sequence.

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Two times the sum of a number and four is no more than three times the sum of the number and seven decreased by four

Answers

Answer:  2(x+4) >3(x+7)-4

Step-by-step explanation:

Hope this helps

Answer:

2(n+4)≤3(n+7)-4

Step-by-step explanation:

The statement "Two times the sum of a number and four is no more than three times the sum of the number and seven decreased by four" is 2(n+4)≤3(n+7)-4

What is a solution set to an inequality or an equation?

If the equation or inequality contains variable terms, then there might be some values of those variables for which that equation or inequality might be true. Such values are called solutions to that equation or inequality.

We need to find the inequality of the statement given;

"Two times the sum of a number and four is no more; than three times the sum of the number and seven decreased by four"

Let n be the unknown number

Then it would be;

2(n+4) ≤ 3(n+ 7) - 4

Hence, The statement "Two times the sum of a number and four is no more than three times the sum of the number and seven decreased by four" is 2(n+4)≤3(n+7)-4

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NO LINKS!! Please help me with this graph​

Answers

Answers: 1st box = 2342nd box = 2343rd box = 54

=========================================================

Explanation:

The three points are at these locations:

A = (10, 6)B = (1,-3)C = (-5, 3)

The notation "d(A,C)" means "the distance from A to C". It's equivalent to saying "the length of segment AC".

Then writing [tex]\left[d(A,C)]^2[/tex] means we'll square that distance.

Use the distance formula to get...

[tex]A = (x_1,y_1) = (10,6) \text{ and } C = (x_2, y_2) = (-5,3)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(10-(-5))^2 + (6-3)^2}\\\\d = \sqrt{(10+5)^2 + (6-3)^2}\\\\d = \sqrt{(15)^2 + (3)^2}\\\\d = \sqrt{225 + 9}\\\\d = \sqrt{234}\\\\[/tex]

This is the exact length of segment AC. That value squares to 234.

[tex]d = \sqrt{234} \ \to \ d^2 = (\sqrt{234})^2 = 234\\\\[/tex]

The square root and squaring operation cancel each other out. Think of it like fire vs water.

So we really only care about what's under the square root; rather than the entire square root expression itself. Which is nice because we don't have to worry about pesky things like decimal values.

This is why 234 is typed into the first box.

---------------------

Next, use the distance formula to find how far it is from A to B. Square the result to get what you see below.

[tex]A = (x_1,y_1) = (10,6) \text{ and } B = (x_2, y_2) = (1,-3)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(10-1)^2 + (6-(-3))^2}\\\\d = \sqrt{(10-1)^2 + (6+3)^2}\\\\d = \sqrt{(9)^2 + (9)^2}\\\\d = \sqrt{81 + 81}\\\\d = \sqrt{162}\\\\d^2 = (\sqrt{162})^2\\\\d^2 = 162\\\\[/tex]

This is the value of [tex]\left[d(A,B)\right]^2[/tex]

Now find the distance from B to C, and square the result.

[tex]B = (x_1,y_1) = (1,-3) \text{ and } C = (x_2, y_2) = (-5,3)\\\\d = \sqrt{(x_1 - x_2)^2 + (y_1 - y_2)^2}\\\\d = \sqrt{(1-(-5))^2 + (-3-3)^2}\\\\d = \sqrt{(1+5)^2 + (-3-3)^2}\\\\d = \sqrt{(6)^2 + (-6)^2}\\\\d = \sqrt{36 + 36}\\\\d = \sqrt{72}\\\\d^2 = \left(\sqrt{72}\right)^2\\\\d^2 = 72\\\\[/tex]

Add this to the previous squared value and we get 162+72 = 234, which matches exactly with the 234 found up toward the top.

We'll write 234 in the 2nd box as well.

This shows that [tex]\left[d(A,C)\right]^2 = \left[d(A,B)\right]^2+\left[d(B,C)\right]^2[/tex] is a true statement. By the converse of the Pythagorean theorem, we have confirmed this is a right triangle.

In other words, we've shown that [tex]a^2+b^2 = c^2[/tex] is a true statement (a,b,c are the sides of the right triangle such that c is the hypotenuse).

---------------------

Recall that we found these segment lengths:

[tex]AB = \sqrt{162} = \text{leg1}\\\\BC = \sqrt{72} = \text{leg2}\\\\AC = \sqrt{234} = \text{hypotenuse}\\\\[/tex]

The legs of a right triangle represent the base and height, in either order. This is because the legs are perpendicular to one another. They form a right (aka 90 degree) angle.

[tex]\text{area} = \frac{1}{2}*\text{base}*\text{height}\\\\\text{area} = \frac{1}{2}*\text{AB}*\text{BC}\\\\\text{area} = \frac{1}{2}*\sqrt{162}*\sqrt{72}\\\\\text{area} = \frac{1}{2}*\sqrt{162*72}\\\\\text{area} = \frac{1}{2}*\sqrt{11664}\\\\\text{area} = \frac{1}{2}*108\\\\\text{area} = 54\\\\[/tex]

Here are some alternative methods you can follow to find the area of this triangle.

Pick's TheoremShoelace TheoremCreate a bounding box around the triangle. Make the box as small as possible. Find the area of the whole box, and subtract off the smaller pieces outside the triangle.Heron's Formula

As for verifying the answers, you can use a tool like GeoGebra.

Answer:

[tex][d(A,C)]^2=\boxed{234}[/tex]

[tex][d(A,B)]^2+[d(B,C)]^2=\boxed{234}[/tex]

[tex]\sf Area=\boxed{54}\; units^2[/tex]

Step-by-step explanation:

From inspection of the given diagram:

A = (10, 6)B = (1, -3)C = (-5, 3)

If ΔABC is a right triangle, the sum of the squares of the two shorter sides will equal the square of the longest side.  This is the definition of Pythagoras Theorem.

Use the distance formula to find the length of each side of the triangle.

[tex]\boxed{\begin{minipage}{7.4 cm}\underline{Distance between two points}\\\\$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$\\\\\\where $(x_1,y_1)$ and $(x_2,y_2)$ are the two points.\\\end{minipage}}[/tex]

[tex]\begin{aligned}d[(A,C)]&=\sqrt{(x_C-x_A)^2+(y_C-y_A)^2}\\&=\sqrt{(-5-10)^2+(3-6)^2}\\&=\sqrt{(-15)^2+(-3)^2}\\&=\sqrt{225+9}\\&=\sqrt{234}\end{aligned}[/tex]

[tex]\begin{aligned}d[(A,B)]&=\sqrt{(x_B-x_A)^2+(y_B-y_A)^2}\\&=\sqrt{(1-10)^2+(-3-6)^2}\\&=\sqrt{(9)^2+(-9)^2}\\&=\sqrt{81+81}\\&=\sqrt{162}\end{aligned}[/tex]

[tex]\begin{aligned}d[(B,C)]&=\sqrt{(x_C-x_B)^2+(y_C-y_B)^2}\\&=\sqrt{(-5-1)^2+(3-(-3))^2}\\&=\sqrt{(-6)^2+(6)^2}\\&=\sqrt{36+36}\\&=\sqrt{72}\end{aligned}[/tex]

Therefore:

The longest side of the triangle is line segment AC.The two shorter sides of the triangle are line segments AB and BC.

[tex]\boxed{\begin{minipage}{9 cm}\underline{Pythagoras Theorem} \\\\$a^2+b^2=c^2$\\\\where:\\ \phantom{ww}$\bullet$ $a$ and $b$ are the legs of the right triangle. \\ \phantom{ww}$\bullet$ $c$ is the hypotenuse (longest side) of the right triangle.\\\end{minipage}}[/tex]

Therefore, the triangle is a right triangle if:

[tex][d(A,B)]^2+[d(B,C)]^2=[d(A,C)]^2[/tex]

Substitute the found side lengths into the formula:

[tex]\implies [\sqrt{162}]^2+[\sqrt{72}]^2=[\sqrt{234}]^2[/tex]

[tex]\implies162+72=234[/tex]

[tex]\implies 234=234[/tex]

Hence proving that ΔABC is a right triangle.

To find the area of a right triangle, half the product of the two shorter sides:

[tex]\begin{aligned}\implies \sf Area &= \dfrac{1}{2}bh\\&=\dfrac{1}{2} \cdot [d(A,B)] \cdot [d(B,C)]\\&=\dfrac{1}{2} \cdot \sqrt{162} \cdot \sqrt{72}\\&=\dfrac{1}{2} \cdot \sqrt{162 \cdot 72}\\&=\dfrac{1}{2} \cdot \sqrt{11664}\\&=\dfrac{1}{2} \cdot \sqrt{108^2}\\&=\dfrac{1}{2} \cdot 108\\&=54 \sf \; units^2\end{aligned}[/tex]

Which of the following is a disadvantage to a questionnaire?

A.
They are inexpensive to administer.

B.
The respondent controls the validity.

C.
The results can be confidential.

D.
They are time efficient.

Answers

A disadvantage of using a questionnaire is that B. The respondent controls the validity.

What is a disadvantage of using questionnaires?

Questionnaires are a means of gathering data in research in order to find out more about a certain phenomenon. They involve writing questions and giving them to a respondent to fill out the answers.

Questionnaires are inexpensive to administer and can lead to confidential results which is good. However, they have the disadvantage that respondents control the validity of questionnaire results and can decide to lie if they feel it would make them look better, which would confuse the research results.

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A 5 foot woman stands 3 feet from a lamppost and casts a 9 foot shadow
as shown. What is the height of the lamppost, rounded to the nearest tenth
of a foot?
O A) 6.5
OC) 6.9
O E) 6.7
O B) 6.8
OD) 6.6

Answers

Answer: e) 6.7

Step-by-step explanation:

This is a Similarity of Triangles problem (geometry)

if x is the height of the lamp post, then:

x/5 = (3 + 9) / 9

x (9) = (12) (9)

x = 60/9 = 6.7

The measures of the angles of a triangle are shown in the figure below. Find the measure of the largest angle.

Answers

The measure of the Largest angle using the angle sum property of a triangle is: 80°

What is the Angle sum property of a triangle?

According to the triangle's "angle sum property," a triangle's angles add up to 180 degrees. Three sides and three angles, one at each vertex, make up a triangle. The sum of the interior angles in a triangle is always 180o, regardless of whether it is acute, obtuse, or right.

One of the most commonly applied properties in geometry is the triangle's angle sum property. Most often, the unknown angles are calculated using this attribute.

In the given figure, we have:

Measure of 1st angle = 64°

Measure of 2nd angle = (2x + 14)°

Measure of 3rd angle = (6x + 14)°

and we know the angle of the property,

using the  angle of property,

64° + (2x + 14)° + (6x + 14)° = 180°

⇒64° + 8x + 14° + 14° = 180°

⇒92°  + 8x = 180°

⇒ 8x = 180° - 92°

⇒8x = 88°

⇒ x = 11°

So,

Measure of 2nd angle = (2x11 + 14)°

Measure of 2nd angle = (36)°

Measure of 3rdangle = (6x11 + 14)°

Measure of 2nd angle = (80)°

Hence,

The measure of the Largest angle using the angle sum property of a triangle is: 80°


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9) A shark descends from the surface of the water at a rate of 15 feet each minute. What is the depth of the shark
after 5 minutes?

Answers

Answer:

75

Step-by-step explanation:

1 minute=15

2 minutes=30

3 minutes=45

4 minutes=60

5 minutes=75

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