3 years ago

Two lines intersecting at a right angle

Mathematics

1 answer:

Zinaida [17]3 years ago

5 0

Answer:

Perpendicular Lines

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Two marathon runners run the full distance of the marathon, approximately 26 miles, in 4 hours.

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Answer:

6.5 miles in 1 hour and they will run 75% of the full distance in 1 hour.

Step-by-step explanation:

The distance covered by two marathon runners = 26 miles

They takes 4 hours

We need to find how many miles did they run in 1 hour

In 4 hour, the distance covered is 26 miles

To find distance covered in 1 hour, divide 26 by 4 such that.

$d=\dfrac{26}{4}\\\\d=6.5\ \text{miles/hour}$

So, they will cover 6.5 miles in 1 hour.

For percentage,

$\%=\dfrac{26-6.5}{26}\times 100\\\\=75\%$

So, they will run 75% of the full distance in 1 hour.

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3 years ago

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Answer:

Step-by-step explanation:

$-8(2b-7)-9(b-5)\qquad\text{use the distributive property:}\ a(b+c)=ab+ac\\\\=(-8)(2b)+(-8)(-7)+(-9)(b)+(-9)(-5)\\\\=-16b+56-9b+45\qquad\text{combine like terms}\\\\=(-16b-9b)+(56+45)\\\\=-25b+101$

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What is the estimated quotient of 57.8/81

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The answer to this is : 0.75 (.75)

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3 years ago

12 decreased by eight times a number is 36 find the number

mina [271]

Answer:

Step-by-step explanation:

You take 12 and subtract 8. You should get 4. Then you divide 36 by 4 and you get 9. So, 12 - 8 x 4 = 36.

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ki77a [65]

$\\ \rm\longmapsto cot40=\dfrac{7.6}{EF}$

$\\ \rm\longmapsto EF=\dfrac{7.6}{cot40}$

$\\ \rm\longmapsto EF=\dfrac{7.6}{1.1}$

$\\ \rm\longmapsto EF=6.909units$

$\\ \rm\longmapstoEF=6.91units$

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2 years ago

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