Question

On a road trip, Andrew plans to use his cruise control for 125 mi, plus or minus 20 mi. Write and solve an equation to find the minimum and maximum number of hours for Andrews road trip.

Answer 1

Answer:

Minimum number of hours = $\frac{105}{60} \\=1.75$

Maximum number of hours = $\frac{145}{60} \\=2.4167$

Step-by-step explanation:

Given that on a road trip,  Andrew plans to use his cruise control for 125 mi, plus or minus 20 mi.

i.e. average time is 125 minutes

It can exceed by 20 minutes or take less time by 20 minute

Hence range of time can be found out by

Minimum number of minutes $= 125-20 =105$

Maximum number of minutes $= 125=20 =145$

Since answer is required in minutes we divide by 60 to get in terms of minutes

Minimum number of hours = $\frac{105}{60} \\=1.75$

Maximum number of hours = $\frac{145}{60} \\=2.4167$