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

it's not an adverb... which one is it?
Q.1. What determines the rate at which energy is delivered by a current ?​
3. If you click on the File Tab, what are the fire most frequently used commands under this tab? 1N 20 3S 45
(1) Oscar Wilde's idea that disobedience is what drives progress is clearly an accurate one. Disobedience has led to people questioning authority, causing histo
What is the function of the cell membrane? Contains Organelles Control center of the cell Regulates what enters and exit the cell
solve for x. 4(2-x)+13=2x+3
find the domain of the equations. do not solve​
Solve for x: Solve for x: 2x + 18 = 20 * ​
Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compou
Luis uses cubes to represent each term of a pattern based on a recursive function. The recursive function defined is f(n + 1) = f(n) + 4, where n is an integer