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

multiply. 7⋅3over4=n Express your answer as a simple fraction or improper fraction in simplest form.
Which of the following is not a reason to use an alloy instead of a pure metal? Brass is more malleable that pure copper. Sterling silver is stronger than pure
Mrs. Flynn works at a bakery and can fit 6 loaves of bread on a tray . If she has 40 loaves of bread . How many trays will she need ?
1-(1/4+2/3) I need help
need this urgentlywill give brainliest
what is the backbone of DNA? plz help ASAPwhat does a nucleotide consist of
Which system of inequalities is shown in the graph?
the rectangle below has an area of x^2-15xy+56y^2 square meters and a width of x-8y meters. what expression represents the length of the rectangle?
what's the answer plz
Which of the following is equal to 5.3? A. 4.6 + 2 × 5 – 2 ÷ 2 B. 4.6 + 2 × (5 – 2) ÷ 2 C. [4.6 + 2 × (5 – 2)] ÷ 2 D. (4.6 + 2) × 5 – 2 ÷ 2