If the following system of equations was written as a matrix equation in the form AX = C, and matrix A was expressed in the form A=[ac]
bd
Find the value of a - b + c + d.

4x+2y=7
5x- 6y=9

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Find the area of the regular hexagon if a side is 20 cm.

Michael is training for a marathon. in his first week he plans to run 8miles. what path should he take