Answer: I am pretty sure its C i hope this helps :D
Step-by-step explanation:
Answer:
Step-by-step explanation:
1) 5 + 12 + 2 + 15 + 9 /5
= 43/5
= 8.6 years
2) 8 + 12 + 7 + 10 + 15 / 5
= 52/5
= 10.4 points
3) 144 + 270 + 204 / 3
= 348 + 270 / 3
= 618 / 3
= 206 books
51-2c
Twice of Carlos age you multiply by 2 and subtract from 51
Multiply everything in the parenthesis by -4.
-12 + 8x + 2x = 2x - 8
Combine like terms.
-12 + 10x = 2x - 8
Subtract 10x from both sides.
-12 = -8x - 8
Add 8 to both sides.
-4 = -8x
Divide both sides by -8.
x = 0.5
Hope this helps!