laceybugtorres
laceybugtorres laceybugtorres
  • 04-03-2016
  • Mathematics
contestada

Solve the system of equations 2x + 3y = 40 and –2x + 2y = 20. A. x = –10, y = 20 B. x = 10, y = 20 C. x = –6, y = 4 D. x = 2, y = 12

Respuesta :

olemakpadu
olemakpadu olemakpadu
  • 05-03-2016
2x + 3y = 40
+
-2x + 2y = 20
___________                  Adding both equations

0x + 5y  = 60
____________


5y = 60
y = 60/5 = 12

y = 12.

Since we have gotten y =12, and the only option with that is option D.

So we don't have to solve for x.

The answer is D.

Answer Link
Аноним Аноним
  • 15-04-2021

Answer:

y=12

Step-by-step explanation:

Answer Link

Otras preguntas

If a seed is planted, it has a 90% chance of growing into a healthy plant. if 7 seeds are planted, what is the probability that exactly 4 don't grow?
Jim Crow laws were forced upon minorities at the end of Reconstruction by what means? 1.the desegregation of all public facilities 2.making it almost impossible
A key role of moneychangers was to help
The tools of formal analysis help us to:
How many subshells are there in the shell with n = 6?
Who tried to blow up the Parliament in November 5, 1605?
Write and solve an equation to answer the question. What number a is 24% of 25?
How did nationalism and militarism contribute to conflicts among nations in Europe? in world war 1
Are the women who become "girl computers" held to higher standeres? Why or why not
Would speaker would it be