Answer is 6.
Get this by:
9+(-3)= ?
When you have the # + -# you will subtract. Hence 9 PLUS a negative 3 you get 6.
Answer:
Step-by-step explanation:

I put both volume and area
Answer:
389
Step-by-step explanation:
MARK BRAINLIEST PLEASE
5(x-8)-(x+6)=18
5x-40-x-6=18
4x-46=18
4x=18+46
4x=64
x=16
not sure if this is correct but i hope it helps!!!
if one customer shows up, and she buys one song, that's $1.29, if she doesn't buy anymore, then that's the charge.
the first song is always at a full price, and after that, to encourage buying, the next ones are just 99 cents, let's see how it goes after a few songs purchases.
1 song.........................$1.29
2 songs.......................$1.29 + 0.99(2)
3 songs.......................$1.29 + 0.99(3)
4 songs.......................$1.29 + 0.99(4)
c songs.......................$1.29 + 0.99(c)
s(c) = 1.29 + 0.99c.