Answer:-8
Step-by-step explanation:
8+4a=3a
8=3a-4a
8=-a
a=-8
Answer:
28.26 square inches
Step-by-step explanation:
Formula for area of a circle:

Radius is 3.

Use 3.14 for pi:

The area should be 28.26 square inches.
Answer:
0.007
Step-by-step explanation:
2 times 7 is 14 and you move the decimal 3 times
Subtract 8 from each side:
-4x = 40
Divide each side by -4 :
x = -10