contestada

Choose a system of equations with the same solution as the following system:

4x − y = −11
2x + 3y = 5

A. 12x − 3y = −33
10x − 6y = −38

B. −4x − 9y = −21
−2x − 7y = −27

C. 4x + 3y = 5
10x + 5y = −1

D. 2x − 4y = −16
4x − 4y = 44

Respuesta :

zrh2sfo

Answer:

x = -2 , y = 3 A: = True, B: = False, C: = False, D: = False

Step-by-step explanation:

Solve the following system:

{4 x - y = -11 | (equation 1)

2 x + 3 y = 5 | (equation 2)

Subtract 1/2 × (equation 1) from equation 2:

{4 x - y = -11 | (equation 1)

0 x+(7 y)/2 = 21/2 | (equation 2)

Multiply equation 2 by 2/7:

{4 x - y = -11 | (equation 1)

0 x+y = 3 | (equation 2)

Add equation 2 to equation 1:

{4 x+0 y = -8 | (equation 1)

0 x+y = 3 | (equation 2)

Divide equation 1 by 4:

{x+0 y = -2 | (equation 1)

0 x+y = 3 | (equation 2)

Collect results:

Answer: x = -2 , y = 3

Answer:

A : 12x - 3y = -33

10x - 6y = -38

Step-by-step explanation:

Took the test and got it right

Otras preguntas