Answer:
Step-by-step explanation:
x= -1 or x=3
20 • 12 is 240
1/2 • 12 • 4 is 24
so 264
121- 88 = 33 miles traversed in 30 minutes.
d = r*t
33 = r* (.5 hr)
Solve for r.
Average speed will be in miles per hour.
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Ratio is 1:3.....added = 4
1/4(48) = 48/4 = 12
3/4(48) = 144/4 = 36
the 2 groups will be 12 and 36
