Suppose that this person drives at r mph going to the mountains, and gets there in 12 hours. Returning, this person drives at (r+20) mph and gets home in 8 hours. We don't know the distance yet, but can solve for the initial speed, r, by setting
d = 12r = (r+20)(8). Solving for r, r=40 mph (going) and (40+20)mph = 60 mph (returning. Since d=12 r, d = (12 hrs)(40 mph) = 480 miles (answer).
Answer:
Ans: 0.0014
Step-by-step explanation:
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B-3/88 because the square trot of 67 is 3
Step 1: divide: 14-3+3*4^2
Step 2: evaluate the power: 14-3+3*16
Step 3: multiply: 14-3+48
Step 4: add and subtract: 59
Answer:59
