Question

PLEASE HELP ASAP THIS IS FOR A GRADE

Noelle has set a goal to run more than 50 mi this month. So far, she has run 10 mi. Her average running speed is 5 mph.

Let h represent the number of hours Noelle runs for the rest of the month.


To meet her goal, Noelle must run more than_____h the rest of the month.

A)5.5
B)8
C)11
D)4.5

Answer 1

B)8

Explanation:

Using h to represent the number of hours Noelle runs, knowing that she runs 5 miles per hour, we have the expression 5h.

She has already run 10 miles; adding this to the previous expression gives us 5h+10.

She wants to run more than 50 miles; this gives us the inequality

5h+10 > 50

Subtract 10 from each side:

5h+10-10 > 50-10

5h > 40

Divide both sides by 5:

5h/5 > 40/5

h > 8

Answer 2

The answer is B because 50mi is the amount she needs to run. If you subtract 10mi from that (what she already ran), you get 40. Then divide 40 by 5 you get 8 so 8 would be the exact minimum to reach her goal.