Please help with these

Please Help With These

Answers

Answer 1

The values would be

sin2x = -3/5

cos2x = -4/5

tan2x = 3/4

What are double angles in trigonometry?

The double angle formulas are used to find the values of double angles of trigonometric functions using their single angle values. For example, the value of cos 30° can be used to find the value of cos 60°. Also, the double-angle formulas can be used to derive the triple-angle formulas.

Given: tanx = -3

Now as we know,

                  [tex]sin2x=\frac{2tanx}{1+tan^2x}\\\\sin2x=\frac{2(-3)}{1+(-3)^2}\\\\sin2x=\frac{-6}{10}\\\\sin2x=\frac{-3}{5}[/tex]

Now

               [tex]cos2x=\frac{1-tan^2x}{1+tan^2x}\\\\cos2x=\frac{1-(-3)^2}{1+(-3)^2}\\\\cos2x=\frac{1-9}{1+9}\\\\cos2x=\frac{-8}{10}\\\\cos2x=\frac{-4}{5}[/tex]

And similarly, we can find the value of tan2x, as

                  tan2x = sin2x/cos2x

                             = (-3/5)/(-4/5)

                             = 3/4

Hence,

The values would be

sin2x = -3/5

cos2x = -4/5

tan2x = 3/4

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Related Questions

The perimeter of a rectangle is 168 feet. Find the length and width if the length is an integer and the width is 4 times the next consecutive integer.

Answers

The length and width of the rectangle are "2.62467ft and 81.38cm "

What is a rectangle?

A rectangle is a quadrilateral with four right angles in the Euclidean plane. It may alternatively be described as a parallelogram with a right angle or an equiangular quadrilateral, where equiangular denotes that all of its angles are equal. A square is a rectangle with four equally long sides.

According to the given information:

Using the formula

P=2(l+w)

Solving for l

[tex]l=\frac{P}{2}-w=\frac{5.51}{2}-0.13 \approx 2.62467 \mathrm{ft}[/tex]

Solving for w

[tex]w=\frac{P}{2}-l=\frac{168}{2}-2.62=81.38 \mathrm{~cm}[/tex]

So, the length and width of the rectangle are "2.62467ft and 81.38cm "

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2- Don Benito had 400
Sheep and will sell 3/4 of that amount, how many sheep will she sell?​

Answers

To find the number of sheep that he will sell, three-fourths of the total number of sheep he had must be calculated. For this, the fraction must be multiplied by the whole number:

[tex]\begin{gathered} \sf \frac{3}{4} \times 400 = \\ \\ \sf \frac{3}{4} \times \frac{400}{1} = \\ \\ \sf \frac{3 \times 400}{4 \times 1} = \\ \\ \sf \boxed{ \sf \frac{ \red{1200}}{ \red4}} = \blue{300}\end{gathered}[/tex]

Therefore, he will sell three hundred sheep.

Answer: She will sell 300 sheep

Step-by-step explanation:

1/4 of 400 sheep is 100 sheep, to find this by, taking 400 divided by 100

So 3/4 will be 300 sheep, to find this by taking 100 timed 3

If you can, please give me a Brainliest, I need 1 more to become an Ace, thank you!

An Uber driver charges $1.75 plus a fee
of $0.85 for each mile traveled. The
total cost of a ride, without a tip, is $8.75. Write
an equation if you wanted to find the value of m,
the number of miles traveled.

Answers

The equation is $1.75+$0.85m= $8.75, after solving the value m =8.24 miles.

What is equation?

An algebraic expression contains one or more variables along with numbers show the equality among them.

Why we use equation?

we use equation to determine an unknown value. we create equation based on a mathematical statement and finally solve it.

The following is the solution of equation of the statement given in question.

Given, fee per mile = $0.85

Charges = $1.75

Total cost of ride = $8.75

let, m is the number of miles travelled

Now, the equation is $1.75+$0.85m = $8.75

                  after solving     0.85m = 7.00

         

                             m = 8.24 miles

hence, the Uber travelled 8.24 miles

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pls Help me , I need you !!!!
The value of a guitar has been found to be -80y + 800, where y is the number of years since it was released.

By how much is the value of the guitar decreasing per year ?

How much Was the initial value of the comic?

Answers

Answer:

13% and 81

Step-by-step explanation:

Find each and every measure.

Answers

Answer: BELOW

Step-by-step explanation:

m<1 62°

m<2 39°

m<3 26°

m<4 55°

m<5 55°

m<6 35

A triangle is equal to 180° so you keep adding angles till you have all your answers.

Whoever answers correctly and with an explanation will get marked Brainliest!!

There are 35 questions total located in Mathematics. This is Algebra I!

Answers

Answer: increasing by 0.25

Step-by-step explanation:

Find the value of the expression 4a + 7 when a = 1/2

.

Answers

Answer:

9

Step-by-step explanation:

4×1/2=2 and adding on 7 would make 9

Answer:

9

Step-by-step explanation:

Expressions are mathematical statements without equal signs.

Expressions and Variables

Expressions are simply combinations of different numbers and operators. The reason 4a + 7 qualifies as an expression is because it has 2 values connected by an operator and no equal sign. In this expression, there is multiplication and addition.

Variables are letters in equations or expressions that represent some numerical value. Variables can represent any number, but in this case, we are told a = 1/2.

Solving the Expression

To solve the expression, all we need to do is plug 1/2 into the expression.

4(1/2) + 7

Then, multiply,

2 + 7

And add,

9

So, when a = 1/2, 4a + 7 = 9.

pls help due tommorw!!! pretty easy!!

Answers

The solution is x²

The monomial that will make the expression as a square of a sum or a difference of trinomial is x²

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , a monomial that will make the expression as a square of a sum or a difference of trinomial is calculated as

(a-b)² = a² -2ab + b²

where a² = 36

taking square roots on both sides of the equation , we get

a = 6

-2ab = -12x

So , one of the variable is x

So , substituting the value of b = x , we get

( 6 - x )² = 36 - 12x + x²

Therefore , the value of the monomial is x²

Hence , The monomial that will make the expression as a square of a sum or a difference of trinomial is x²

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Ann, ben and cheryl hare ome money in the ratio 3:7:10. Ben receive £650 more than Ann. Calculate the total amount of money that they hared

Answers

The total amount of money that they hared is 13000.

What is amount?

The amount of something is how much there is, or how much you have, need, or get. He needs that amount of money to survive. [ + of] I still do a certain amount of work for them.

Ann, ben and cheryl hare ome money in the ratio 3:7:10

Ben receive £650 more than Ann.

Ann = 3*650=1950

ben= 7*650=4550

cheryl hare ome = 10*650= 6500

The total amount of money that they hared 1950+4550+6500= 13000.

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There are 6 cards in a bag numbered 1 through 6. Suppose we draw two cards numbered A and B out of the bag(without replacement), what is the variance of A 2B

Answers

The Variance of (A +2B) is 12.6724.

What is  Variance ?

Variability is measured by the variance. The average of the squared deviations from the mean is used to compute it. The degree of dispersion in your data collection is indicated by variance. The variance is greater in respect to the mean the more dispersed the data.

Here we have to select two card out of 6 card. now suppose we take 2 card (1,2 ) out of six card (1,2,3,4,5,6) . so here A=1 and B=2 but it is also possible that A=2 and B =1 because it represent same two card . Therefore here order of card matter.

Hence the posible out come of selecting 2 card are (without replacement)

-- (1,2) (1,3) (1,4) (1,5) (1,6)

(2,1) -- (2,3) (2,4) (2,5) (2,6)

(3,1) (3,2) -- (3,4) (3,5) (3,6)

(4,1) (4,2) (4,3) -- (4,5) (4,6)

(5,1) (5,2) (5,3) (5,4) -- (5,6)

(6,1) (6,2) (6,3) (6,4) (6,5) --

Therefore A+2B of this outcome are

A B A+2B

1 2 5

1 3 7

1 4 9

1 5 11

1 6 13

2 1 4

2 3 8

2 4 10

2 5 12

2 6 14

3 1 5

3 2 7

3 4 11

3 5 13

3 6 15

4 1 6

4 2 8

4 3 10

4 5 14

4 6 16

5 1 7

5 2 9

5 3 11

5 4 13

5 6 17

6 1 8

6 2 10

6 3 12

6 4 14

6 5 16

therefore there variance of A +2B can be computed as follows

x x2

5 25

7 49

9 81

11 121

13 169

4 16

8 64

10 100

12 144

14 196

5 25

7 49

11 121

13 169

15 225

6 36

8 64

10 100

14 196

16 256

7 49

9 81

11 121

13 169

17 289

8 64

10 100

12 144

14 196

16 256

[tex]\Sigma x=315[/tex]       [tex]\sum x^2=3675[/tex]

Therefore variance

[tex]$$\begin{aligned}& =\frac{\sum x^2-\frac{\left(\sum x\right)^2}{n}}{n-1} \\& =\frac{3675-\frac{(315)^2}{30}}{30-1} \\& =\frac{3675-3307.5}{29} \\& =12.6724\end{aligned}$$[/tex]

The Variance of (A +2B) is 12.6724.

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HELP ME THIS IS DUE TOMARROW

What linear expression would you need to subtract from (5x+3) to have a difference of −x ?

Answers

Answer: Expression that is to be deducted will be (6x + 3).

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Which expression is equivalent to
(2x+4)-(3x²+2x-1)?
A-3x² +3
B -3x² +5
C-3x² +4x+3
D -6x³-16x² - 6x+4

Answers

Answer:

[tex]\huge\boxed{\sf Option \ B}[/tex]

Step-by-step explanation:

Given expression:

= (2x + 4) - (3x² + 2x - 1)

Solve parenthesis

= 2x + 4 - 3x² - 2x + 1

Combine like terms

= -3x² + 2x - 2x + 4 + 1

= -3x² + 5

[tex]\rule[225]{225}{2}[/tex]

need help on this ASAP!!

Answers

Answer:

no solution to the equation

Step-by-step explanation:

Answer:

no solution to the equation

One interior angle of a triangle is 34°, and the other two angles are congruent. Choose the equation that could be used to determine the degree measure of one of the congruent angles. x − 34 = 90 x + 34 = 180 2x − 34 = 90 2x + 34 = 180

Answers

The correct statement is 2x + 34 = 180.


15. Suppose $12,000 is borrowed for 5 years and is to be paid back with interest in one lump sum. If the annual interest
rate is 8%, what will the lump sum payment be? (Use 1= Prt)
a. $16,800.00
b. $492,000.00
c. $16,100.00
d. $17,400.00
e. $4,800.00

Answers

Answer:

Step-by-step explanation:

To solve this problem, we need to use the formula for the present value of a lump sum payment: $PV = FV \cdot (1 + r)^{-t}$, where $PV$ is the present value (the lump sum payment that needs to be made), $FV$ is the future value (the amount borrowed), $r$ is the annual interest rate, and $t$ is the number of years the money is borrowed for.In this case, we are given that $FV = 12,000$, $r = 8%$, and $t = 5$ years. Plugging these values into the formula, we get $PV = 12,000 \cdot (1 + 0.08)^{-5} = 12,000 \cdot 0.5987 = 7,184.40$.Therefore, the lump sum payment that needs to be made is $PV = \boxed{7184.40}$. The answer is $\boxed{\text{(a)}\ $16,800.00}$ is incorrect.

There are 26,358 children living in this town. Half of the children are boys. There are about ________ boys living in this town.​

Answers

Answer:

13179

Step-by-step explanation:

It says half of the children are boys, which means division

26358 divided by 2 is 13179

Answer:

13,179

Step-by-step explanation:

the answer is 13,179 because 26,358 divided by 2 is 13,179

2=1/2

I need help answering this

Answers

Y=-2x-3 check the image below for workings

I don't have much to say please help me​

Answers

Answer: for 216 the answer is 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108 and 216

for 96 it is  1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, and 96.

for 64 it is  1, 2, 4, 8, 16, 32 and 64.

Step-by-step explanation:

Hello Can someone solve this with steps please

Answers

Answer:

7.5 x 10^5

Step-by-step explanation:

See the attached worksheet.

Scientific notation is a very convenient protocol for working with, and reporting, very large or small numbers.  It allows one to condense all the non-significant zeros into an expression of 10^x.  Examples:

1)   0.00000000000000000015   becomes 1.5x10^-19, and

2)  45000000000000000000000  becomes 4.5x10^22

Both numbers are much easier to compare, the notation approach saves space (publishers), takes less time to type, and makes the math much easier, as this problem will demonstrate.  It also eliminates many transcription errors.  E.g., try dividing these two numbers using long division.

The specific problem here is to divide two very different numbers.  The attached worksheet explains the steps.  

Jimmy drives 6.5 miles to his aunt’s house. For every mile Jimmy drives, the amount of gas in the car’s gas tank changes by -0.04 gallon. What is the total change in the gallons of gas in the cars tank??

Answers

We will see that the amount of gasoline increased by 5.25 gallons over that five-day period.

How many more or fewer gallons of gas did the car's tank contain overall?

Here we want to study the table to see the total change in the amount of gasoline over the five-day period.

Now we need to study the given graph:

Notice that each day we have the change of that particular day, then we just need to add all of these changes and we will get the total change.

Where the negative numbers mean that the gasoline was used, and the positive numbers represent a charge in the gasoline (so it increases).

C = -1.05 - 1.20 - 0.85 + 10.50 - 2.15 = 5.25

This means that, in total, the amount of gasoline increased by 5.25 gallons over that five-day period.

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What is m∠C? What is m∠C?

Answers

The unknown angle in the triangle is as follows:

m∠C = 60 degrees.

How to find the angle of a triangle?

A triangle is a polygon with three sides. The sum of angles in a triangle is 180 degrees.

A triangle can be named base on it's angles or sides. They include equilateral triangle, scalene triangle, Isosceles triangle, Right triangle, Acute triangle etc

Therefore, let's solve the angle C of the triangle as follows;

m∠C = 2x

x + 2x + 3x = 180

6x = 180

divide both sides by 6

x = 180 / 6

x = 30

Therefore,

m∠C = 2x = 2(30) = 60 degrees.

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A town in east Texas received 25 inches of rain in two weeks. If it kept raining at this rate for a 31-day
month, how much rain did the town receive? Round your answer to the nearest inch.
The town received approximately
inches of rain during a 31-day month.

Answers

We get approximately 56 inches of rain during a 31-day month.

What is the rate in mathematics?

In mathematics, a rate is a ratio that compares two different quantities. It is a way to express the relationship between two quantities that have different units of measure. For example, you might express the rate at which you are traveling as miles per hour, which compares the distance you have traveled (in miles) to the time it took you to travel that distance (in hours).

To find the amount of rain the town received in a 31-day month, we need to determine the daily rainfall rate and then multiply it by the number of days in the month.

The town received 25 inches of rain in two weeks, which is equal to 25/2 = 12.5 inches per week. Since there are 7 days in a week, the daily rainfall rate is 12.5/7 = 1.79 inches per day.

If it kept raining at this rate for a 31-day month, the town would receive approximately 1.79 inches per day * 31 days = 55.9 inches of rain.

Hence, we get approximately 56 inches of rain during a 31-day month.

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We get approximately 56 inches of rain during a 31-day month.

What is the rate in mathematics?

In mathematics, a rate is a ratio that compares two different quantities. It is a way to express the relationship between two quantities that have different units of measure. For example, you might express the rate at which you are traveling as miles per hour, which compares the distance you have traveled (in miles) to the time it took you to travel that distance (in hours).

To find the amount of rain the town received in a 31-day month, we need to determine the daily rainfall rate and then multiply it by the number of days in the month.

The town received 25 inches of rain in two weeks, which is equal to 25/2 = 12.5 inches per week. Since there are 7 days in a week, the daily rainfall rate is 12.5/7 = 1.79 inches per day.

If it kept raining at this rate for a 31-day month, the town would receive approximately 1.79 inches per day * 31 days = 55.9 inches of rain.

Hence, we get approximately 56 inches of rain during a 31-day month.

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look at the screenshot

Answers

Answer:

c) 72-34=38

Step-by-step explanation:

Convert 10 meters 1 min to centimeters mim​

Answers

The 10 meters /1 min = 1000 centimeters/min.

What is unit conversion meaning?

The same attribute is expressed using a unit conversion, but in a different unit of measurement. For instance, time can be expressed in minutes rather than hours, and distance can be expressed in kilometers, feet, or any other measurement unit instead of miles.

We have,

10 meters per 1 min

We know that,

Meters to a centimeters conversion table

Meters (m) Centimeters (cm)

0.1 m          10 cm

1 m                  100 cm

2 m                  200 cm

3 m                  300 cm

so,

10 m                 1000 cm

1000 centimeters per min.

Hence, the 10 meters /1 min = 1000 centimeters/min.

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mr. bell gave out a science test last week to six honors students. the scores were 88, 94, 80, 79, 74, and 83. what is the standard deviation of the scores?

Answers

The standard deviation of the scores is  6.48

For given set of scores,  88, 94, 80, 79, 74, and 83

Here, the number of observations = 6

The mean of the scores would be,

μ = Σx/n

μ = (88 + 94 + 80 + 79 + 74 + 83)/6

μ = 498/6

μ = 83

Using the formula of standard deviation,

σ = √((Xi−μ)^2)/n

σ = √[(88 - 83)² + (94 - 83)² + (80 - 83)² + (79 - 83)² + (74 - 83)² + (83 - 83)²]/6

σ = √(252/6)

σ = √42

σ = 6.48

Therefore,  the standard deviation = 6.48

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Can you please help me?

Answers

Answer:

It should be 5/6

Step-by-step explanation:

:)rawr

What can you conclude about the triangles? *Hint: What is congruent and how can you prove it?

Answers

The conclusion about the triangle is that the two triangles are congruent i.e they are equal

What are Congruent triangles?

Two triangles are said to be congruent if all three corresponding sides are equal and all the three corresponding angles are equal in measure.

In the figure, triangle ∆GHJ and ∆ GKM are the two triangles formed.

To prove that triangle GHJ = GKM

angle KGM= angle JGH ( opposite angles)

angle K = angle H (alternating angles)

Therefore angle H = angle J

since the three angles of each triangles are equal, we can say the triangles are congruent.

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What are the slopes of the lines representing Juliana's
and Emiliano's recipes?
Let x represent the number of cups of flour and y
represent the number of cups of sugar.

Answers

to get the slope of any straight line, we simply need two points off of it, for Juliana and Emiliano let's use those points in the picture below.

[tex]\stackrel{\textit{\LARGE Juliana}}{(\stackrel{x_1}{2}~,~\stackrel{y_1}{1})\qquad (\stackrel{x_2}{4}~,~\stackrel{y_2}{2})} ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{2}-\stackrel{y1}{1}}}{\underset{run} {\underset{x_2}{4}-\underset{x_1}{2}}} \implies {\Large \begin{array}{llll} \cfrac{1 }{ 2 } \end{array}} \\\\[-0.35em] ~\dotfill[/tex]

[tex]\stackrel{\textit{\LARGE Emiliano}}{(\stackrel{x_1}{1\frac{1}{2}}~,~\stackrel{y_1}{1})\qquad (\stackrel{x_2}{4\frac{1}{2}}~,~\stackrel{y_2}{3})} ~\hfill \stackrel{slope}{m}\implies \cfrac{\stackrel{rise} {\stackrel{y_2}{3}-\stackrel{y1}{1}}}{\underset{run} {\underset{x_2}{4\frac{1}{2}}-\underset{x_1}{1\frac{1}{2}}}}\implies {\Large \begin{array}{llll} \cfrac{2}{3} \end{array}}[/tex]

HELP MEE!! 45 points!!
Solve. What is r in the inequality? r– (–1) ≤ 1

Answers

Answer:

r ≤ 0

Step-by-step explanation in image.

Answer:

r<0

Step-by-step explanation:

r-(-1)<1

the oposite of -1 is 1

r+1<1

subatract 1 from both sides

r<1-1

subatract 1 from 1 to get 0

r<0

2.3.PS-17 Question Help - Julio says, "If you subtract 14 from my number and multiply the difference by -2, the result is -40." What is Julio's number?

please and Thank You​

Answers

Answer:

34

Step-by-step explanation:

-2(x - 14) = -40  Distribute the -2

-2x + 28 = -40   Subtract 28 from both sides

-2x = -68  Divide both sides by -2

x = 34

Check:

34- 14 = 20

-2(20) = -40

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