Answer:

Step-by-step explanation:
Since we see that 3/7 is multiplied by itself three times, we can use exponents as a shorter way to write this. The expontent tells us how many times the base number, 3/7, is multiplied by itself.
= 
We then multiply by -1 to (3/7)^3 to get the exact answer.

Answer:
Carl has to sell at least
cookies.

Step-by-step explanation:
Carl gets
by selling 1 chocolate bar.
Earning from chocolate bars:

Earning From cookies:


Carl wants to raise at least 

Less than, because if you add 15+8 it equals 23 so less than
Answer:
2
Step-by-step explanation:
2 (x-2)=8 equal to 2x-4=8, put -4 to the other side by subtracting 4 on both sides once you do you get 2x=4 so 4 divided by 2 equals 2.
Answer:
<h2>69</h2>
Step-by-step explanation:
(-)(-) = (+)
(+)(+) = (+)
(-)(+) = (+)(-) = (-)
--------------------------------------
16 - (-53) = 16 + 53 = 69