Caroline drove 350 miles to get grandmother's house. the trip took 5 1/4 hours. what is her average speed in miles per hour?

66.666 mph or 66.67

Step-by-step explanation:

First I would change 1/4 to .25 so the equation would look like this.

350/ 5.25 = 66.666 Continues so you could round it to the nearest hundredth.

You have R=unknown, something for which to solve;

T(total)=5 1/4 hours

D(distance) =350 miles.

Keep your calculations in miles per hour.

Distance ÷ Time

350  ÷ 5 1/4 (need to make the whole number a fraction and need to make mixed number a fraction)

350/1  ÷ 21/4=

350/1 ×  4/21= 1400/ 21= 66 2/3

7.25

step-by-step explanation:

we know that 7 equals to 7.0. we also know that 1/4=0.25. so we can add the two together and we get 7.25