# Thread: please someone help me with some algebra questions need someone smart?

1. ## please someone help me with some algebra questions need someone smart?

Solve x + 3y = 7 if x and y must be whole numbers.
(Points: 4)
{(0, 5), (1, 3), (2, 1)}
{(2, 1), (1, 4), (0, 7)}
{(1, 2), (4, 1), (7, 0)}
{(0, 5), (1, 4), (2, 1)}

What is the slope of a line perpendicular to the line with equation y = 4x + 5
(Points: 4)
Option A: 4
Option B: -4
Option C: -1/4
Option D: -5

4. What is the slope of a line parallel to the line whose equation is 5x - 2y = 11
(Points: 4)
Option A: - 11/2
Option B: -5/2
Option C: -2/5
Option D: 5/2

5. Which of the following has a slope of 2 and a y-intercept of –4 (Points: 4)
y = –2x + 4
y = 2x + 4
y = 2x – 4
y = –2x – 4

6. Which ordered pair is on the graph of the equation 3x + 7y = 11
(Points: 4)
(1, -2)
(0,-4)
(6, -1)
(0, 4)

2. 1. The easiest thing to do would be to plug in x and y into the equation and see if the answer is 7. Example: Plug (0,5) in. 0 + 3(5)= 15. So that is not a correct answer.

2. Lines perpendicular to each other have opposite slopes. So if a line had a slope of 4/5 a line perpendicular to it would have a slope of -5/4.

4. Parallel lines have the same slope. You must change 5x - 2y = 11 into y= mx + b form, where m is the slope and b is the y-intercept.

5. Use y= mx + b equation. m is the slope and b is the y-intercept.

6. Use the same strategy as #1. Plug the points given to you into the equation and see if the outcome is 11.