fatlenny fatlenny
  • 19-12-2018
  • Mathematics
contestada

Use the substitute method to solve the system of equations.
3x+y=10
y=2x
A. (-2,4)
B. (2,-4)
C. (2,4)
D. (4,2)

Respuesta :

blackbeaniscute blackbeaniscute
  • 19-12-2018

Answer:

C

Step-by-step explanation:

plug in y = 2x into the first equation

3x+2x = 10

5x = 10

x = 2


put it into the second equation because its easier

y = 2(2)

y = 4


(2, 4)

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