Cramer's rule:
what is [ax] in the system below?

Ax = ⇒ 3rd answer

Step-by-step explanation:

Lets revise the Cramer's rule

- If the system of equation is ax + by = c and dx + ey = f

- A is the matrix represent this system of equation

- The first column has the coefficients of x, and

  the second column has the coefficients of y

∴ A =

- Ax means replace the column of x by the answers of the equation

∴ Ax =

- Ay means replace the column of y by the answers of the equation

∴ Ay =

* Now lets solve the problem

∵ 4x - y = -3 and -2x + y = 5

∴ A =

- Replace the column of x by the answer to get Ax

∴ Ax =

* Ax in the system of equation is

C

Step-by-step explanation:

Edge2021

a=r

d=q

c=p

b=s

hope this !

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