Question

HELP WITH ONE PLEASE!

Amy can ride her bike 4 miles in 30 minutes. Sebastian can ride his bike 3 miles in 24 minutes. At her

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current rate, what is the distance, in miles, Amy can ride her bike in 12 minutes?

(A) 1.6

(B) 2.5

(C) 3.0

(D) 9.0


Sally drives 66 miles in 3 hours and Molly drives 72 miles in 4 hours. What is the difference between

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their average speeds, in miles per hour?

(A) 4

(B) 6

(C) 18

(D) 22

Answer 1

24. (A) 1.6

23. (A) 4

Explanation:

24.

Amy's distance is proportional to the time spent riding, so in 12/30 of the time (12 minutes out of 30 minutes), she will ride 12/30 of the distance:

... (12/30)·(4 mi) = 48/30 mi = 1.6 mi

23.

Sally's speed is (66 mi)/(3 h) = 22 mi/h. Molly's speed is (72 mi)/(4 h) = 18 mi/h.

The difference between their speeds is (22 -18) mi/h. = 4 mi/h.