in What are the coordinates of the focus of the parabola? (x + 5) = 16 (y - 4) Enter your answer by filling in the boxes. 9 focus: Consider matrix A. Does the inverse of matrix A exist? Select answers from the drop-down menus to correctly complete the statements. The inverse of a square matrix exists only when Choose... Choose... all entries are the same sign no two entries are equal the determinant does not equal zero The inverse of matrix A 4 Choose... Choose.. does exist does not exist lower bound = 19 20 21 22 23 What is the lower bound of the polynomial function? f(x)=x-x - 2x + 5x - 6 Enter your answer in the box.