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

what is a high structure part of a church which has 5 letters
Why is sodium sulphate hemihydrate called as "Plaster of Paris"?
Why is sodium sulphate hemihydrate called as "Plaster of Paris"?
Simplify the expressions: cot 0 sec 0 A. Sin0 B. Csc0 C. Cos0 D. Cos* 0
what is a high structure part of a church which has 5 letters
How do you?...Multiply out and simplify 10(2x-1)-20x?
What is the least common denominator for 5/6 and 3/8. 3/4 and 6/7
What were the major causes of WWII? Please include at least 4 answers.
in the number 13,407.036 there are two 3's. Explain how the values of the 3's are related.
you have a standard deck of 52 cards. you pick one card and then, with out putting the first card back, you pick a second card. what is the probability that bot