[tex]-2\sqrt{15}(-8+10\sqrt{15}[/tex]

Answers

Answer 1

We simplify the expression -2√15(-8 + 10√15) = 150 + 16√15

To answer the question, we need to know what surds are

What are surds?

Surds are square roots of positive integers.

Since we have  -2√15(-8 + 10√15), we simplify the expression

So, -2√15(-8 + 10√15) = -2√15 × (-8) + 10√15 × √15 (expanding the bracket)

= -2× (-8) × √15 + 10 × √(15 × 15)

=  16 × √15 + 10 × √15²

=  16 × √15 + 10 × 15

=  16√15 + 150

=  150 + 16√15

So, we simplify the expression -2√15(-8 + 10√15) = 150 + 16√15

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Related Questions

i need help pleaseee

Answers

Answer: $7448

Step-by-step explanation:

Year 1: 1.218x

Year 2: 1.218(1.218x)

Year 3: 1.218(1.218(1.218x))

Year 4: 1.218(1.218(1.218(1.218x)))

Year 5: 1.218(1.218(1.218(1.218(1.218x))))

Year 6: 1.218(1.218(1.218(1.218(1.218(1.218x)))))

Year 7: 1.218(1.218(1.218(1.218(1.218(1.218(1.218x))))))

Year 8: 1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218x)))))))

Year 9: 1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218x))))))))

Year 10: 1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218(1.218x)))))))))

Year 11: x(1.218¹¹)

Year 12: x(1.218¹²) = 79,400

         

x(10.6602517) = 79,400

x = 79,400/10.6602517

x=7448.22939

x = $7448

Hope this helps!

what is the full answer to pie

Answers

Answer:

[tex]\pi[/tex]= 3.1415926...= c/d

Step-by-step explanation

Pie is infinite so there is no simple answer.

circumference divided by the diameter = pie

What is the value of x?

Answers

the answer is 120. ur welcome
Answer: x=138

Explanation: an octagons interior angle sum is 1080 . if you add the given interior angles then subtract the total from 1080 , you will result in 138 .

What is the measure of angle c in the parallelogram shown

Answers

Answer:

35°

Step-by-step explanation:

Same-Side interior angles (consecutive angles) are supplementary.

Supplementary meaning that those two angles add up to make 180°.

So Angles C is 35°

Using the curve of best fit, what would be the output (y) when the input (x) is 7?

Answers

Answer:

y = 260

Step-by-step explanation:

locate x = 7 on the x- axis, go vertically up to meet the graph at (7, 260 )

when input is 7 then output y = 260

A coin is tossed 3 times. what is the probability of getting:

Answer correctly please​

Answers

The probability of all heads, all tails, exactly two tails, exactly one head will be 1/8, 1/8, 3/8, and 3/8 respectively.

The complete question is given below.

What is probability?

Its basic premise is that something will almost certainly happen. The percentage of favorable events to the total number of occurrences.

Then the total number of the event will be

Total event = 2³

Total event = 8 {HHH, HHT, HTH, THH, HTT, THT, HHT, TTT}

Then the probability of all heads will be

⇒ 1/8

Then the probability of all tails will be

⇒ 1/8

Then the probability of exactly two tails will be

⇒ 3/8

Then the probability of exactly one head will be

⇒ 3/8

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Ronald compared the rate at which water is used from two different water storage tanks by measuring the volume of the water remaining. The results are shown in the table

Answers

The statement that best describes the results is in tank 1, the rate at which water is used is higher.

What is the rate for each tank?

Tank 1:

Total of water used/ time177.12/4 = 44.28 gallons per hour

Tank 2:

160/ 4 = 40 gallons per hour

What are the results?

The rate in tank 1 is higher than the rate in tank 2.

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given that x = 7.4 m and θ = 32°, work out bc rounded to 3 sf.

(not drawn to scale)

Answers

Answer:

BC ≈ 11.8 m

Step-by-step explanation:

using the tangent ratio in the right triangle

tanΘ = [tex]\frac{opposite}{adjacent}[/tex] = [tex]\frac{AB}{BC}[/tex] = [tex]\frac{x}{BC}[/tex] , that is

tan32° = [tex]\frac{7.4}{BC}[/tex] ( multiply both sides by BC )

BC × tan32° = 7.4 ( divide both sides by tan32° )

BC = [tex]\frac{7.4}{tan32}[/tex] ≈ 11.8 m ( to 3 sf )

Yan is somewhere between his home and the stadium. To get to the stadium he can walk directly to the stadium, or else he can walk home and then ride his bicycle to the stadium. He rides 7 times as fast as he walks, and both choices require the same amount of time. What is the ratio of Yan's distance from his home to his distance from the stadium

Answers

Answer:

  3/4

Step-by-step explanation:

The relationship between time, speed, and distance can be used together with the travel time relations to find the desired ratio.

__

setup

Let H represent the distance from Yan's location to home. Let S represent the distance to the stadium, and let w represent Yan's walking speed.

The time required for Yan to walk home is ...

  time = distance/speed = H/w

The time required for Yan to walk to the stadium is ...

  time = S/w

The time required for Yan to ride his bike from home to the stadium is ...

  time = (H +S)/(7w) . . . . . his riding speed is 7 times his walking speed.

In order for the travel times to be equal, we must have ...

  time to walk home + time to bike to stadium = time to walk to stadium

  H/w + (H +S)/(7w) = S/w

__

solution

Multiplying by 7w gives ...

  7H +(H +S) = 7S

  8H = 6S . . . . . . . . . subtract S

  H/S = 6/8 = 3/4 . . . . divide by 8S

The ratio of Yan's distance from home to his distance from the stadium is 3/4.

_____

Additional comment

Another way to think about this is ...

The stadium is farther away than home by a distance that Yan can walk in the same time he can bike the entire distance from home to the stadium. That is, the difference in distances must be 1/7 of the total distance. Now, we have a "sum and difference" problem: S +H = 7, S -H = 1. The solution is S = (7+1)/2 = 4, H = (7-1)/2 = 3. H/S = 3/4.

Whoever answers correctly gets BRAINLIEST and 100 points

A regular-size box of crackers measures 214 inches by 912 inches by 14 inches. The manufacturer also sells a snack-size box that has a volume that is 15 of the volume of the regular-size box.

What is the volume of the snack-size box of crackers?

Enter your answer as a mixed number in simplest form by filling in the boxes.
$$

​ in³

Answers

Answer:

[tex]\sf 59 \frac{17}{20} \: in^3[/tex]

Step-by-step explanation:

Regular-size box of crackers

Dimensions:  [tex]\sf 2 \frac{1}{4} \: in \times 9 \frac{1}{2}\:in \times 14\: in[/tex]

Snack-size box of crackers

Volume = [tex]\sf \frac{1}{5}[/tex] of the volume of a regular-size box

To calculate the volume of the snack-size box of crackers, calculate the volume of the regular-size box then multiply it by [tex]\sf \frac{1}{5}[/tex].

[tex]\begin{aligned}\textsf{Volume of a rectangular prism} & = \textsf{width x length x height}\\\\\implies \textsf{Volume of regular-size box} & = \sf 9 \frac{1}{2} \times 14 \times 2 \frac{1}{4}\\\\& = \sf \dfrac{19}{2} \times 14 \times \dfrac{9}{4}\\\\& = \sf \dfrac{19 \times 14 \times 9}{2 \times 4}\\\\& = \sf \dfrac{1197}{4}\: in^3\end{aligned}[/tex]

[tex]\begin{aligned}\implies \textsf{Volume of snack-size box} & = \sf \dfrac{1}{5} \times \textsf{volume of regular-size box}\\\\& = \sf \dfrac{1}{5} \times \dfrac{1197}{4}\\\\& = \sf \dfrac{1 \times 1197}{5 \times 4}\\\\& = \sf \dfrac{1197}{20}\\\\& = \sf 59 \dfrac{17}{20}\: in^3\end{aligned}[/tex]

Therefore, the volume of the snack-size box is [tex]\sf 59 \frac{17}{20} \: in^3[/tex]

Marcia needs a packing box with a volume of at least 180 cubic inches.



Part A

Is the box the correct size? Explain.

Question 2
Part B

Shipping costs $0.15 per cubic inch. How much will Marcia pay to ship the box?

Answers

Answer:

Part A: Yes

Part B: $30

Step-by-step explanation:

Some information is missing, but I did see a similar problem that shows a box shaped like a rectangular prism with length 5 in., width 4 in., and height 10 in.

Part A.

volume = length × width × height

volume = 5 in. × 4 in. × 10 in.

volume = 200 in.³

Since the volume has to be at least 180 in.³, then a volume of 200 in.³ will be ok since 200 is greater than 180.

Answer: Yes

Part B.

$0.15/in.³ × 200 in.³ = $30

Answer: $30

ANSWER ASAP PLEASE! 14 POINTS

Answers

Answer:

the first one

Step-by-step explanation:

the formul is y=mx+b

m is slope which is -3/2

b is y intercept and it is -3

and the addition sign will change based on if the y intercept is negative or not

Hope this helps

) The gym teacher divided a class into four teams with 7 students per team. How many students are in the class?

Answers

Answer:

28 students

Step-by-step explanation:

7 times 4 = 28

there are are seven students in 4 teams, so that means there are 4 groups of seven, and you multiply them together to get how many students in the class

Answer:

28

Keyword(s):

divided, four, 7, per team, how many

Step-by-step explanation:

7 × 4 = 28

Whoever answers first will get brainliest answer!

mrs. mank is decorating a 4-foot by 9-foot bulletin board in her classroom. if she decides to put a purple border around the entire board, what is the length of border that she needs?

Answers

Answer:

36 feet

Step-by-step explanation:

To find the area of a square or rectangle you multiply the width by the length.


There are 9 red and 6 green marbles in a bag. A child reaches in the bag and randomly takes one marble. What is the probability
of that child getting a green marble?
A .66
B.40
с .33
D .10

Answers

Answer:

THE OPTIONS ARE WRONG

Step-by-step explanation:

N(S)=9 + 6 = 15N(R) = 9N(G) = 6P(G) = N(G)/N(S) = 6/ 15 = 0.4___________________________

DONE successful

A triathlon requires participant to complete the following tasks:

Task 1: Swim 750 m
Task 2: Cycle 20 km
Task 3: Run 5 km

Mr Lee swam at 10 km/h, cycled at 85 km/h and ran at 14 km/h during the triathlon. Find the total time taken by him to complete the triathlon, leaving your answer in minutes and the nearest second.

Answers

Answer:

Step-by-step explanation:

Time taken for task 1:

Distance= 750m= 0.75 km

Speed= 10 km/hr

Time taken1= S (distance)/ V (speed)= 0.75/10= 0.075 hr= 4 mins and 30 sec

Time taken for task 2:

t2=S/V= 20/85= 0.24 hr= 14 mins and 24 sec

Time taken for task 3:

t3= S/V = 5/14= 0.36 hr= 21 mins and 36 sec

Total time took:

T1 +T2+T3= 40 mins and 30 second (approximately)

An angel measures 122 degree more than the measures of supplementary angle. what is the measure of each angle.

Answers

Answer:

302 degrees

Step-by-step explanation:

The sum of 3 times a number and 7 is equal to 5. (translate into an equation)

Answers

Answer:

let n be the number then the sum of this number and 7 is n +7 and 3 times this sum is 3(n +7) 5 times the number less thirteen is 5n − 13

Step-by-step explanation:

Please help it’s easy, State the property that is used. 10=10•1

Answers

The property identity of multiplication is applied in the given statement.

Properties of Multiplication

The properties of multiplication are:

Distributive:  a(b±c)=  ab±acComutative:   a . b = b. aAssociative:    a(b+c)=  c(a+b)Identity: b.1=b

From the property identity, you know that the product between any number by the number 1 equals that number. Example: 3 1=3.

The question shows 10=10•1. Like, it was shown previously, this occurs due to the identity property of multiplication.

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Are any of the sides perpendicular? Is the triangle a right triangle? Yes, AB and Bc are perpendicular

Answers

AB and BC are perpendicular because they intersect at a 90 degree angle

In the following diagram, BC is parallel to DE.
What is the measure of Zx?
Angles are not necessarily drawn to scale.
W
103°
B
D
4x =
F
42°
H
E

Answers

Answer: 35

Step-by-step explanation:

Angles in a triangle add to 180 degrees, so in triangle ABC, [tex]m\angle C=180-103-42=35^{\circ}[/tex].

Sp, by the corresponding angles theorem, x=35

Solvex - 5+ 7 = 15.
A. x = 13 and x = -3
-13 and x = 3
C. x = -13 and x = -3
OD. x = 13 and x = -13
OB. x =

Answers

Answer:

A. X= 13 and X= -3

Step-by-step explanation:

subtract 7 from both sides, simplify, break down the problems into 2 equations, solve equations, and boom once solve both equations you get 2 solutions.

The solutions to the equation are x = 13 and x = -3.

Therefore, the correct option is A.

Given is an expression |x-5| + 7 = 15, we need to solve for x,

To solve the equation |x - 5| + 7 = 15 for x, we'll need to isolate the absolute value expression and then solve for x.

Here's the step-by-step process:

Step 1: Subtract 7 from both sides of the equation:

|x - 5| = 15 - 7

|x - 5| = 8

Step 2: Break the equation into two cases, one with the positive value inside the absolute value and one with the negative value inside the absolute value.

Case 1: x - 5 is positive:

For this case, the equation |x - 5| = 8 becomes:

x - 5 = 8

Now, solve for x:

x = 8 + 5

x = 13

Case 2: x - 5 is negative:

For this case, the equation |x - 5| = 8 becomes:

-(x - 5) = 8

Simplify and solve for x:

-x + 5 = 8

-x = 8 - 5

-x = 3

Multiply both sides by -1 to isolate x:

x = -3

So, the solutions to the equation are x = 13 and x = -3.

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The first steps in determining the perimeter of triangle ABC are shown.



To the nearest whole unit, what is the perimeter of triangle ABC?

6 units
8 units
14 units
16 units

Answers

To answer this question we must see the picture of the triangle

Answer:

C)    14 Units

Step-by-step explanation:

E2020

Can someone please help me!!

Answers

Multiplication is the process of multiplying. Jay lost 30 pounds in a period of 6 months.

What is multiplication?

Multiplication is the process of multiplying, therefore, adding a number to itself for the number of times stated. For example, 3 × 4 means 3 is added to itself 4 times, and vice versa for the other number.

A.) The newly recorded temperature in January will be six times the temperature in February, therefore, we can write,

January = 6 × February = 6×(-3°F) = -18°F

Hence, the newly recorded temperature in January will be equal to -18°F.

B.) Change in water level on each day of the drought was equal to -4 inches, while the drought lasted for 1 week(7days), Thus, the net change in water level can be written as,

net change = 7 × -4 = -28inches

Hence, the net change in the water level during the drought was equal to -28 inches.

C.) Jay went on a diet for six months and lost 5 pounds each month, therefore, the net change in the weight will be equal to,

Net Change = 6 × 5 = 30 pounds

Hence, Jay lost 30 pounds in a period of 6 months.

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how many 4 digit numbers n have the property that the 3 digit number obtained by removing the leftmost digit is one ninth of n

Answers

Answer:

  7

Step-by-step explanation:

We want to find the number 4-digit of positive integers n such that removing the thousands digit divides the number by 9.

__

Let the thousands digit be 'd'. Then we want to find the integer solutions to ...

  n -1000d = n/9

  n -n/9 = 1000d . . . . . . add 1000d -n/9

  8n = 9000d . . . . . . . . multiply by 9

  n = 1125d . . . . . . . . . divide by 8

The values of d that will give a suitable 4-digit value of n are 1 through 7.

When d=8, n is 9000. Removing the 9 gives 0, not 1000.

When d=9, n is 10125, not a 4-digit number.

There are 7 4-digit numbers such that removing the thousands digit gives 1/9 of the number.

Presently, Victor is three times as old as Maria. Ten years ago, Victor was seven times as old as Maria. How old is each person now?

Answers

Step-by-step explanation:

v = Victor's age

m = Maria's age

v = 3m

v - 10 = 7(m - 10)

3m - 10 = 7m - 70

60 = 4m

m = 15

v = 3m = 3×15 = 45

Victor is 45 years old. Maria is 15 years old.

The population of a town is growing exponentially and can be modeled by the
equation f(t) = 42. e(0.015). The population is measured in thousands, and time is
measured in years 1950.

C. According to this model approximately what is the population in 1960?

Answers

The population of the town in 1960 is 48.80 thousands

How to determine the population in 1950?

The equation of the model is given as:

f(t) = 42e^(0.015t)

1960 is 10 years after 1950.

This means that:

t = 10

Substitute t = 10 in f(t) = 42e^(0.015t)

f(10) = 42e^(0.015 * 10)

Evaluate

f(10) = 48.80

Hence, the population of the town in 1960 is 48.80 thousands

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Can somebody please help me with this?

Answers

Answer:

The slope of the line is:  

              [tex]-\frac{3}{4}[/tex]

Slope of a parallel line is the same:

             [tex]-\frac{3}{4}[/tex]

Slope of a perpendicular line, invert the sign and fraction:

              [tex]\frac{4}{3}[/tex]

Hope this helps

What is the degree measure of ∠COA?

Answers

The degree measure of angle COA = 128 degree.

What is Angle Sum Property?

It is defined by the property that the sum of the interior angles of a triangle is equal to 180 degrees.

To determine the value of angle COA ,

we have to draw a line connecting CA ,

as OC and OA are the radius of the circle and therefore the sides of the triangle formed will be equal and also the angle made by them ,

angle OAC = angle OCA

Therefore angle DCA = angle DAC

By angle sum property

2x + 52 = 180

2x = 128

x = 64 degree

angle DCO = 90 degree

Therefore angle ACO = 90-64 = 26 degree

Similarly, angle CAO = 26 degree

By angle sum property

26+26+x = 180

52+x = 180

x = 128 degree

The degree measure of angle COA = 128 degree.

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Solve for h.
6h= 7h + 5
H= ?

Answers

Answer:

h = -5

Step-by-step explanation:

1) Subtract 7th from both sides

6h = 7h + 5

6h - 7h= 7h + 5 - 7h

2) Simplify

- Combine like terms

6h - 7h = 7h + 5 - 7h

-h = 7h + 5 - 7h

- Combine like terms

-h = 7h + 5 - 7h

-h = 5

3) Divide both sides by the same factor

-h = 5

-h/-1 = 5/-1

4) Simplify

Cancel terms that are in both the numerator and denominator

h/-1 = 5/-1

h = 5/-1

Divide the numbers

h = 5/-1

h = -5

Answer:

The answer is H=-5

Step-by-step explanation:

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