Brian is choosing between two exercise routines.
In Routine #1, he burns 20 calories walking. He then runs at a rate that burns 8.5 calories per minute.
In Routine #2, he burns 38 calories walking. He then runs at a rate that burns 6.25 calories per minute.
For what amounts of time spent running will Routine #1 burn fewer calories than Routine #2?
Use t for the number of minutes spent running, and solve your inequality for t.

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

3

step-by-step explanation: