Question

Which is a solution of the equation?

2x + y = 5

A.
(1, 2)

B.
5

C.
(2, –1)

D.
(3, –1)
@Hero @ganeshie8 @phi @texaschic101

Answer 1

D

Answer 2

Thank you @Happyhappyhappy

Answer 3

do you know how she got the answer ?

Answer 4

she just subbed in her points into the equation to see if it satisfies it.
(3,-1)...x = 3 and y = -1
2x + y = 5
2(3) + (-1) = 5
6 - 1 = 5
5 = 5 (correct)

understand ? See how these points satisfy the equation ?

Answer 5

Thank you @texaschic101 , I understand now. :)

Answer 6

good to hear :)

Answer 7

A line and a point not on the line lie in exactly one plane.