Find x and y. Give reasons to justify your solution.

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Simplify. (-2)^-3 a. -8 b. -1/8 c. 1/8 d. 8

Which one is the correct answer, and why?