Which of the following reveals the minimum value for the equation 3x2 + 18x + 15 = 0?
3(x + 3)2 = 6
3(x + 9)2 = 12
3(x + 3)2 = 12
3(x + 9)2 = 228

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

answer: it's a

step-by-step explanation: