Which expressions below are equivalent to 43c+513 ? select all that apply. □ a. 13(4c+16) □ b. 43(c+4) □ c. 13(33c+5) □ d. 23(2c+8) □ e. 23(3c+5) □ f. 43(c+513)

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

Can someone me and plz do the problem

[15 points]find the least common multiple of the expressions: 1. 3x^2, 6x - 18 2. 5x, 5x(x +2) 3. x^2 - 9, x + 3 4. x^2 - 3x - 10, x + 2 explain if possible