Posted by **Ley** on Thursday, April 18, 2013 at 7:29pm.

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

PLEASE HELP a.s.a.p

- Algebra 1 -
**Reiny**, Thursday, April 18, 2013 at 8:28pm
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

- Algebra 1 -
**Ley**, Friday, April 19, 2013 at 10:05am
Thank you Reiny

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