20 points!
Which expressions equal 9 when x = 4 and y = 1/3? Select ALL that are correct. 2x + 3y 5 (x/2) - 3y 3x - 9y x^2 + 6y y^2 - 21x

2x+3y

5(x/2)-3y

3x-9y

Step-by-step explanation:

2x+3y and 3x-9y

1) lets substitute 9, 4, and 1/3 into all the equations

2(4)+3(1/3)=9

8+1=9

9=9- this equation is true

(4)/2-3(1/3)

2-1=9

1=9- NOT TRUE

3(4)-9(1/3)=9

12-3=9

9=9-TRUE

4^2+6(1/3)

16+2=9

18=9 -NOT TRUE

(1/3)^2-21(4)

1/9-84=9

-83.88=9- NOTTRUE

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

definitely a. the others have almost all data points on one side of the line.

step-by-step explanation: