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3 years ago

Sam bought a kit to make a skateboard ramp. The kit contains 3 pieces of wood, one is 3 feet long, one is 4 feet

Mathematics

1 answer:

gayaneshka [121]3 years ago

7 0

Don’t click on that link

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What are 2 numbers that add up to 8 and multiply to 15?

Zepler [3.9K]

Hi there, the two numbers would be 5 and 3 because 5+3=8 and 5*3=15. So, the two numbers are 5 and 3

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4 years ago

a girl wants to count the steps of a moving escalator which is going up. if she is going up on it, she counts 60 steps. if she i

Leto [7]

Let

x--------> the speed of the girl in step

y--------> the speed of the escalator in step

d------> the distance between ground and floor.

we know that

$speed=\frac{distance}{time} \\ \\ time=\frac{distance}{speed}$

when the girl is going up on escalator

$x-y=\frac{d}{60}$ ----> equation $1$

when the girl is going down on escalator

$x+y=\frac{d}{90}$ -------> equation $2$

Adds equation $1$ and equation $2$

$2x=\frac{d}{60} +\frac{d}{90} \\ \\ 2x=\frac{5}{180} d$

$x=\frac{5}{360}d$ --------> equation $3$

Time to climb (in step) with y=0 (escalator standing still)

$x*t=d\\\\ t=\frac{d}{x}$ -----> equation $4$

Substitute equation $3$ in equation $4$

$t=\frac{d}{\frac{5d}{360}} \\ \\ t=\frac{360}{5} \\ \\ t=72 steps$

therefore

the answer is

$72 steps$

5 0

3 years ago

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You order two drinks for 2.49 each and an entree for 12.95. if sales tax is 5% what is your total bill

Arada [10]

$18.83

(2.49+2.49+12.95)+5%

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3 years ago

You want to order carpet for an area in your house. The room measures 12 feet by 10 feet. The carpet is sold in square yards. Ho

FromTheMoon [43]

Answer:

yards of carpet you need: 4*10/3=40/3=13.3333 yd^2

Step-by-step explanation:

convert feet to yard:

1 yard=3 feet so

12 feet=4 yards

10 feet=10/3 yard=3.33333 yard

yards of carpet you need: 4*10/3=40/3=13.3333 yd^2

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3 years ago

How can you be sure the lines you constructed are parallel?

Natali5045456 [20]

They will be strait alined with the other line perfectly

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3 years ago

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