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1 year ago

Please answer the question below:

Mathematics

1 answer:

irinina [24]1 year ago

5 0

please give brainliest<3

Answer:

y=3

Step-by-step explanation:

(3 + 12) / (7 - 12) = (15) / (-5) = -3

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Simplify (-12x^3)(6x^7)

zysi [14]

-72x^10 would be the correct answer

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3 years ago

It takes Sue, Jeff and Todd 4 hours to paint a room together. If it takes Sue 10 hours by herself and Jeff 12 hours by himself,

diamong [38]

The number of time it would take Todd to paint the room alone is 15 hours.

Let the Todd's time be t.

Given the following data:

Combine time = 4 hours

Sue's time = 10 hours

Jeff's time = 12 hours

To calculate the number of time it would take Todd to paint the room alone:

How to solve a word problem:

In order to solve this exercise, we would first of all calculate their individual rate and combined rate respectively. Finally, we would add their individual rates together and equate it to the combined rate.

For Sue:

$Rate = \frac{1}{10} \;work/hr$

For Jeff:

$Rate = \frac{1}{12} \;work/hr$

For Todd:

$Rate = \frac{1}{t} \;work/hr$

Combined rate:

$Rate = \frac{1}{4} \;work/hr$

Adding the individual rates, we have:

$\frac{1}{10} +\frac{1}{12} +\frac{1}{t} =\frac{1}{4} \\
\\
$

Multiplying all through by 120t, we have:

$12t+10t+120=30t\\
\\
22t+120=30t\\
\\
120=30t-22t\\
\\
120=8t\\
\\
t=\frac{120}{8}$

t = 15 hours.

Read more on word problems here: brainly.com/question/13170908

5 0

2 years ago

The top of a 2.7m ladder, leaning against a wall, reaches a height of 1.6m. What angle, to the nearest degree, does the ladder m

VladimirAG [237]

So the hypotenuse is 2.7, and the opposite is 1.6.

We can use sine to find the angle.

sin(x) = (1.6)/(2.7)

Simplify:

sin(x) = 0.592592593

Plug this in your calculator to find the inverse of sine:

x = 36.34120312

So the angle is 36 degrees.

7 0

4 years ago

Read 2 more answers

What operation would I do to find the average of something?

Lady bird [3.3K]

Sum divided by count. Add up all the numbers and divide it by how many numbers it is.

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3 years ago

What 3 numbers when multiplied, equals to 4,000? Please help! Will give Brainliest!

vlada-n [284]

Answer:

you can do (500)(4) x 2