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

1 2.1.4 Quiz: Understand Characters through Symbols Question 10 of 10 How is an artifact with special meaning used in a story? A. As a backstory B. As a conclu
persona que habla ante el micrófono en un programa de radio
Choose the base or root word for the following word. addition add add ition ition
is this a run on sentence?: a ballad is a song, it tells a story
A function is graphed on the coordinate plane. What is the value of the function when x = 4? (-1, 2)
(2x4 + 3x – 5) + (6x4 + 2x2 + 2) +
Select each item that was a key factor in Woodrow Wilson’s Fourteen Points. A. Self-determination B. Mandate system C. Open Door Policy D. Freedom of the se
Which provides evidence that political parties are not as strong as they once were?​
Read and choose the option that answers the question. Primero, se lavan el pelo con champú. Segundo, se peinan el pelo. En el tercer paso de su rutina, se lava
What's 9+10? is it 21 or 19.