This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

2x+5=x+12

y-4=x+5

Step-by-step explanation:

first solve for x, then put the variable of x into the secon equation and solve for y

y - 4 = x + 5 --> y = x + 9

2x + 5 = x + 12

x + 5 = 12

x = 7

y = 7 + 9 = 16

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

32

step-by-step explanation: