If x+y= 7 and 2x+3y= 17 then what is x and what is y?

x= 4 and y= 3

Step-by-step explanation: y=7-x so we replace 3y with 3(7-x): 2x + 3(7-x)= 17 —> 2x+21 -3x =17 —> -x = -4 / x= 4.

Y = 7-4 —> y= 3

i leave the calculator work to you.

7. diameter 4 miles, circumference 4π miles

8. radius 0.2 miles, circumference 0.4π miles

[this is a bad problem because the actual radius of a car on the track is less than 0.2 miles so the answer is less than 0.4π miles]

9. radius 6 feet, circumference 12π feet

10. diameter 14 cm, circumference 14π cm

11. diameter 4.8 feet, circumference 4.8π feet