Please help me with these 3 questions!! Will mark Brainliest :)

7. 75.36 inches

8. 21 inches

9. 13 inches

Step-by-step explanation:

7. Circumference = π × d

The diameter would be two times the radius, or 2 × 12 = 24. So, circumference would be 3.14 × 24 = 75.36 inches.

8. Circumference = π × d

If we move variables around, d = Circumference / π

So, d = 65.94 / 3.14 = 21 inches.

9. To do this, let's figure out the diameter: d = Circumference / π

d = 81.64 / 3.14 = 26. Now the diameter is two times the radius, so to get the length of the radius, we must divide the diameter in half. 26 / 2 = 13 inches.

step-by-step explanation:

if x decreases by 4 then y increases by 10

step-by-step explanation: