Using the order of operations and locations of parentheses (brackets), change the value of a string of five 5s to evaluate to 9

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Find the coordinates of point x that lies along the directed line segment from y(-8, 8) to t(-15, -13) and partitions the segment in the ratio of 5: 2.