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

Recommended rate for effective compressions for adult/child is:
Trying to figure this one out
Use division to find all the whole number ratios equivalent to 168 : 56
The surface area of a sphere is decreasing at the constant rate of 3*pi sq. cm/sec . ? At what rate is the volume of the sphere decreasing at the instant its ra
Kevin can travel 22 1/2 miles in 1/3 hour .What is the average speed in miles per hour?
I need help with this question
why did people film battles an wars
Which of the following is a blood disorder characterized by crescent-shaped, red blood cells and is caused by a recessive allele that produces an alternate form
Tamara can proofread 12 pages in 6 minutes. how many minutes will it take her to proofread 96 pages?
The atoms of a molecule come from two or more?