Can someone check my answers? I'm not sure I have them all right...

What is the y-intercept of the plane whose equation is 4x + 5y z = 20?

(0, 4, 0) < my answer

(0, 5, 0)

(5, 0, 0)

(0, 0, 4)



Question 2. Which equation has intercepts at X(1, 0, 0), Y(0, 1, 0), and Z(0, 0, 2)?

x y + 2z = 4

3x 2y + 6z = 12

2x 2y + z = 2

4x 4y + z = 4



Question 3. Which equation is equivalent to x + 3y z = 3?

3x + 6y 3z = 6

4x + 12y 4z = 12

2x + 4y 2z = 8

2x + 3y 4z = 12



Question 4.4. Which of the following points lies in the plane 3x 2y + 4z = 12?

(2, 2, 3)

(5, 15, 2)

(4, 16, 2) < my answer

(4, 3,2)