5. Which of the following is equivalent to the expression below? Select all that apply? (4x – 6) – 12x + 18. a. 6x – 9 b. -6x+9 c. -3(2x - 4) d. -5x + 9 + x

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

i got 142 as my answer

step-by-step explanation: