Kamika made a trip of 45 mi in 3 3/4 hours. What was her average speed in miles per hour?

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Kamika made a trip of 45 mi in 3 3/4 hours. What was her average speed in miles per hour?

2007-03-23 13:08:18 · 4 answers · asked by Anonymous in Education & Reference ➔ Homework Help

4 answers

Use the formula D = RT where D is distance, R is the rate of speed, and T is the time.So, 45 = 15/4R (I changed 3 3/4 hours to an improper fraction). Cross multiply and you get 180 = 15R. Divide by 15 and you get R = 12mph.

2007-03-24 04:23:53 · answer #1 · answered by dpirsq2 5 · 0⤊ 0⤋

45/1 divided by 15/4=
45/1 x 4/15 15 becomes 1 and 45 becomes 3
3x4=12 milesper hour

2007-03-23 20:27:00 · answer #2 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋

12 miles per hour

2007-03-23 20:19:58 · answer #3 · answered by Fallen 4 · 0⤊ 0⤋

x = vt
45miles = v (3.75hr)
v = 12miles/hr

2007-03-23 20:48:15 · answer #4 · answered by 7 · 0⤊ 0⤋