Question

An athlete can burn 10 calories per minute while running and 4 calories per minute while walking. If the athlete burns 450 calories in 60 minutes, how long is spent on each activity?

Answer 1

x=running time
y=walking time

x+y=60
10x+4y=450

can you solve the system??

Answer 2

I thought t needs one variable?

Answer 3

i'll solve it for you
first multiply the first equation by 4

4x+4y=240
10x+4y=450 subtract

-6x = -210
x=35 min

y=60-35 =25 min