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

How well did feudalism establish order in the Middle ages?
What is the diameter of a circle whose circumference measures 86 26/35? Use pi= 22/7
Express the perimeter of the triangle as a polynomial. 8x+2 5x-4 9x+3
Which sentence has two antecedents and one pronoun? Laurie likes to bake in her new oven. Cody and Aleena sold their car. My school does not have an October
4(3-5)=-2(8-z)-6z what is z
a summary about concussions
What statement best describes a republic?
What would be the most likely effect of one company buying a competitor?
Dalia has just enough money to buy either 6 pears and 20 oranges or 12 oranges and 11 pears. A pear costs $ 0.80. How much does an Orange cost ?
_______ is the largest continental biome. It experiences long, cold winters; short, mild summers; and low precipitation. It is characterized by coniferous fore