Answer:
Yes you are right on both.
Step-by-step explanation:
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Answer = $160
Using the formula 100+4n, we need to substitute 15 with n. Therefore making the formula, 100 + 4×15. 4×15 = 60. 60+100= $160.
-Hope it helps!
There could be five in each class.
Answer:

Step-by-step explanation:
Considering the expression

Solution Steps:

as

so


join 
so






so


so



Therefore

Answer:
a³-b³= (a-b)(a²+ab+ b²)
Step-by-step explanation: