What is the y-value of the vertex of the function f(x)=-(x+8)(x-14)

Find the solution set of this inequality. enter your answer in interval notation using grouping symbols. |8x-4| ≤ 12

How many real-number solutions does the equation have? -4x^2 + 10x + 6 = 0 a. no solutions b. two solutions c. infinitely many solutions d. one solution

Find an bif a = {3, 6, 9, 12) and b = {2, 4, 6, 8, 10).