paytonkimberly2131 paytonkimberly2131
  • 02-08-2022
  • Mathematics
contestada

Solve the system of equations below using a matrix equation.

2x + y = - 7

x − y = 4

Select one:

a.
( 1, 5 )


b.
( - 1, - 5 )


c.
( - 1, -2 )


d.
( 0, - 7 )

Respuesta :

driftecook driftecook
  • 02-08-2022

Answer is b. ( -1, -5)


Answer is b. (-1, -5)

Step by step

Substitute the x and y values into both equations to find equality

 Answer b. Makes both equations equal

2x + y = -7

2(-1) + (-5) = -7

-2 -5 = -7

-7 = -7
it equals now let’s do the 2nd one

x - y = 4

-1 -(-5) = 4

4 = 4

This one equals too. I did the math on the other three answers and they did not equal. 

Answer Link

Otras preguntas

the only Native American who successfully stayed on their land were A) Seminole B) Sauk C) Cherokee D) Fox
what were National and State Bank policies in the 1830's contributed to?
Are many valuable minerals found in or near areas of volcanic activity and mountain building?
two thirds of what number equals 436
Which pronoun correctly completes the elliptical clause? You folded fewer towels than __________. A. him B. he
what does a 220 degree angle look like?
How many ping pong balls would it take to fill a classroom that measures 22 feet by 16 feet by 9 feet? (Assume that a ping pong ball has a diameter of 1.5 inch
What is .5v^1/3 Can u please help? Ian super lost!!!!!!
PLEASE HELP IS THE OLD YELLER !!!!!!!!!!!! When does Mrs. Coates first demonstrate that she recognizes Travis is taking on his father's role? A. when Travis go
which of the following did not trigger Haiti's fight for independence