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

answer with step-by-step explanation:

a. ∠j is supplementary to ∠k - true:

(opposite angles of a trapezoid are supplementary which means that they add up to 180 degrees)

b. kl is parallel to jm - true:

(opposite sides are parallel to each other in a trapezoid)

c. jk is perpendicular to kl - false:

(clearly, jk does not make a right angle with kl)

d. jk is parallel to lm - false:

(jk and lm are two lines opposite in direction to each other so they cannot be parallel)

e. ∠j is congruent to ∠m - true:

(the angles on each side of the base are congruent)

f. ∠j is congruent to ∠k - false:

(the angles on the same side but opposite side of the base are not congruent)

step-by-step explanation:

which of the following statements correctly describes the expression below based on its degree and number of terms?

314 - 7x2 + 11