Hdz0xx2001 Hdz0xx2001
  • 06-09-2018
  • Mathematics
contestada

Use the matrix to solve the system of equations

5x-4y=28
7x+5y=18

Respuesta :

shinberg
shinberg shinberg
  • 06-09-2018

Okay so I wont be able to show the row here but I will try my best.

7(5x-4y=28) = 35x-28y=196

-5(7x+5y=18) = -35x-25y=-90

= -53y=106

= y=-2

5x-4(-2) =28

5x+8=28

5x=20

x=4

Answer Link

Otras preguntas

Would the friction force increase, decrease, or stay the same if Marco added two more blocks to the sled or wagon? Explain your answer.
rectangle......a to the power of 4 yards times a to the power of 9 yards
A person with cystic fibrosis releases few enzymes into their small intestine. Explain what problems this causes. Thanks!
what is the size range of a eukaryotic cell
Why might an ecologist set up an artificial environment in laboratory ? Help
How did Pascal seek to reconcile faith and reason?
Divide 72 rolls into 2 groups so the ratio is 3 to 5.
a dragonfly can beat its wings 30 times per second. Write an equation in slope-intercept form that shows the relationship between flying time in seconds and the
Divide 72 rolls into 2 groups so the ratio is 3 to 5.
why is Andrew wiggin called the third?