Question

Use the elimination method to solve the system of equations. Choose the correct ordered pair.

5x - 2y = 9
3x + 4y = -5

A. (1, -2)
B. (3, 3)
C. (7, 13)
D. (5, -5)

Answer 1

a

Answer 2

Elimination Method:
5x -2y = 9 ----equation 1
3x + 4y = -5 ----equation 2

multiply equation 1 by 2
2(5x -2y = 9)
10x - 4y = 18 ----equation 3

add equations 2 and 3
3x + 4y = -5
+ 10x - 4y = 18
13x = 13
x = 1

substitute the value of x to equation 1
5x -2y = 9
5(1) -2y = 9
5 - 2y = 9
-2y = 9 -5
-2y = 4
y = -2
solution (1,-2)

Answer 3

Thanks Shinal

Answer 4

And mayur

Answer 5

Which matrix represents the system of equations shown below?

-4x + 6y = 9
8x - y = 7

A.
B.
C.
D.

Answer 6

http://media.apexlearning.com/Images/200908/18/c3a375ce-2d64-4bec-91b0-c7a935103758.gif A

Answer 7

http://media.apexlearning.com/Images/200908/18/37103a47-d94a-4493-99e6-f89bbedbe3ea.gif B

Answer 8

http://media.apexlearning.com/Images/200908/18/dfb5f388-133d-4796-a3c9-8a935c5ebc1a.gif C

Answer 9

http://media.apexlearning.com/Images/200908/18/c249a335-ff76-4618-8e1f-e9075134b9be.gif D