Please help, much needed. A lot of points

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

What are the sotions to the quadratic equation 9x^2=4

Which of the following expressions is equal to 2x^2+8