Tara works out on the treadmill for half an hour. She runs at 8 miles/hour for x hours, jogs at 6 miles/hour for y hours, and walks at 4 miles/hour for z hours. The total distance that she runs, walks, and jogs is . If she walks for as long as she runs and jogs combined, which system of equations represents this situation?

step-by-step explanation:

it will be a cylinder. with a diameter of 8 and 4 single pieces high

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

x=0

step-by-step explanation: