# Algebra 1

1.To solve the linear system below, which substitution of unkowns is proper ?
A.substitute 5x-16 for y in the first eqn
B.substitute 5x+16 for y in the first eqn
C.substitute 5x+12 for y in the first eqn
D.substitute 7y-4 for x in the second eqn

2.A line with a slope of -2 passes through the point (-2,4). If (c,-2) is another point on the line, what is the value of c?

3. Use lines with equations x+5y=5 and 5x + py = 5. a.Find p if the lines are parallel. b.Find p if the lines are perpendicular.

4.Write an equation in standard form of a line that is perpendicular to the line that passes through the points (-3,-8) and (-2,5) ?

5.Which pair of lines are parallel?
k:4x-y=-3 L:-4x-5=y
m:5y=3x+35 n:10y+20=6x
choices: A.k and m B.L and m C.k and n
D.n and m

1. 👍
2. 👎
3. 👁
1. 2.
so the slope between (-2,4) and (c,-2) must be -2
(-2-4)/(c+2) = -2
-6 = -2c - 4
c = 2

3. slope of x+5y = 5 is -1/5
slope of 5x + py = 5 is -5/p
-5/p = -1/5
p = 25

4. slope for the 2 given points = (5+8)/(-2+3) = 13
y-5 = 13(x+2)
y = 13x + 31
OR
13x - y = -31

5. try it
see which pair has the same slope

1. 👍
2. 👎
2. Thank you Reiny

1. 👍
2. 👎

## Similar Questions

1. ### How do I do this.?(Math.)

Use the Substitution method to solve the system of equations. y - 2x = -5 3y - x = 5 Solve one of the equations for x or y. Let's solve the first one for y: y - 2x = -5 y = 2x - 5 Now let's substitute 2x - 5 for y in the second

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the

3. ### math

If you try to solve a linear system by the substitution method and get the result 0 = 8, what does this mean? A. The system has one solution, (0,8). B.The system has one solution, (8,0). C.The system has no solutions. D.The system

4. ### math

What is the first step in solving the linear system {2x−3y=11 {−x+5y=−9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second equation

1. ### Algebra Help

1. Verify that (-4, 12) is the solution to the system. Show work to justify your answer 2x+y=5 -5x-2y=-6 2. Solve the system by graphing. State the solution. x + y =2 2y – x = 10 3. Solve the system by substitution. State

2. ### math

What is the first step in solving the linear system {2x − 3y = 11 {−x + 5y = −9 by the substitution method in the most efficient way? A. Solve the first equation for x. B. Solve the first equation for y. C. Solve the second

3. ### Algebra22222!!!

Choose the ordered pair that is a solution to the system of equations. 3x - y = 10 -x + y = -4 (3, -7) (-1, 3) (3, -1) (3, 1) Follow the example I gave in your previous question. I'm not going to do all of them. You want to

4. ### algebra

how do you use the substitution method to solve the linear system? -2x-5y=7 7x=y=-8

1. ### Algebra

Solve this system of linear equations. * Used the substitution method 3x - y = 8 4x - y = -15 ----------------------------------------- WORK y = 3x - 8 4x - (3x - 8 ) = -15 4x - 3x + 8 = -15 x + 8 = -15 x = -7 3x - y = 8 3(-7) - y

2. ### math

Create a linear system to model this situation. Then use substitution to solve the linear system to solve the problem. - Bobbie has been saving dimes & quarters to buy a new toy. She has a total of 28 dimes and quarters, with a