Which system of equations correspond to this matrix equation? question 9 options: 5x + 2x = -7 3y - 4y = -6 5x + 2y = -7 3x + 4y = -6 5x + 2y = -7 3x - 4y = -6 5x - 2y = -7 3x - 4y = -6

5x + 2x = -7  

3y - 4y = -6

Step-by-step explanation:

Given the matrix, we can multiply across the constant matrix and down the  variable matrix

5x +2y = -7

3x -4y = -6

(C)

Step-by-step explanation:

When multiplying matrices:

Row 1 x Column 1 = the value in Row 1 Column 1

Row 2 x Column 1 = the value in Row 2 Column 1

Combine the two equations to get:

to find the perimeter of the rectangle this is the expression:

x-9+x-9+3x-4+3x-4=138

if we simplify it:

8x-26=138

remember, 138 is what it all adds up to

the length is 11.5cm

the width is 57.5cm

the area is 661.25cm^2

the answers might not be correct use at own risk

well your weight will go up if you are not going to burn the calories/ carbs

step-by-step explanation: