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

A frequency distribution that has a "tail" extending to the left with most of the data on the right side of the distribution has a skew. normal negative rigN le
From the top of the canyon, there was a sheer drop of 450 feet.
Convert 1 year to minutes
A comparison of 2 things using simile words “like” or “as”
how many nutrons are in an atom of copper
Through November, Cameron has received gross income of $120,000. For December, Cameron is considering whether to accept one more work engagements for the year.
Write the equation of the line in slope intercept form that passes through the given point and satisfies the given condition. (-3,-5); parallel to y=-4x+1
Simplify the expression 4 + (-2)3. Three is to the third power -12 12 -4 -2
What is the different betweenprofessional and processionalhuman resources?​
5.27 repeating as a mixed number in simplest form