Solve the linear system of equations using the linear combination method. {4x−9y=202x−6y=16 enter your answers in the boxes. x = y =

A

Step-by-step explanation:

-4.5, 4.25

The correct answer is:

x = -4; y = -4

Explanation:

We are going to eliminate the variable x. In order to do this, we are going to make the coefficients the same by multiplying the second equation by 2:

In order to eliminate x, we must subtract the transformed second equation from the first:

Divide both sides by 3:

3y/3 = -12/3

y = -4

Substitute this into the first equation:

4x-9y = 20

4x-9(-4) = 20

4x--36 = 20

4x+36 = 20

Subtract 36 from each side:

4x+36-36 = 20-36

4x = -16

Divide both sides by 4:

4x/4 = -16/4

x = -4

the required function is .

step-by-step explanation:

from the given table it is noticed that the graph passing through (-3,7), (0,4), (3,1) and (8,-4).

it is a linear function because the value of y is decrease by one as the value of x increase by 1.

the slope of the function is

the slope of the function is -1 and the y-intercept is 4.

the slope intercept form is

where, m is slope and b is y-intercept.

therefore the required function is . the graph of this function is shown below.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b