Solve for w.
30 = –6w + 12

w= -3

Step-by-step explanation:

To solve for w, we need to get w by itself. To solve, do the opposite of what is being done, and whatever is done to one side, needs to be done to the other.

30 = –6w + 12

First, subtract 12 from both sides, since it is being added

30-12= -6w +12-12

18= -6w

Divide both sides by -6, since it is being multiplied

18/-6= -6w/-6

The -6s on the right cancel, and we are left with

-3= w

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

the answer is b