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User Glenatron
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2 Answers

2 votes

Answer:

Option A. 63 minutes

Explanation:

30 ------- 27

100 ----- x

x = (100)(27)/30 = 2700/30 = 90

90 -27 =63

Hope this helps

User Kockiren
by
8.3k points
2 votes

Answer: A, 63 minutes

Explanation:

We can start by making this into two ratios. Isa finished 30% in 27 minutes, so 30/27 is our first ratio. We want to know how long it will take for the rest of the homework to be completed. 30% is finished already, which leaves 70% (100-30=70). The time left is x. Our second ratio is 70/x. Now, we can set the two ratios equal to each other to solve for x.


(30)/(27) = (70)/(x)

We can now cross multiply.


30x= 27(70)

Now, we simplify the right side.


30x= 1890

Divide both sides by 30 to isolate x.


x= 63

And there's your answer! Hope this helped!

User Nomanr
by
7.8k points

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