David would have to save for 7 weeks in order to have enough money for his bike.

Example:
5w - five apples
8 - eight strawberries
5w + 8 = (five apples) + (eight strawberries) = 13 of what?
You can add only numbers of the same fruits.
Answer:
9.87
Step-by-step explanation:
usually in math you never have to write down what pi squared is, you just have it incorporated into your equations. But here is the best written answer.
2^31
use the rule that states the product of the same base with different powers you add them
(a^n) times (a^m) = a^(n+m)
Answer:
144
Step-by-step explanation:
Put the number where the variable is and do the arithmetic.
9p^2 = 9·4^2 = 9·16
9p^2 = 144 . . . . when p=4