Algebra 1
posted by Ley on .
1.To solve the linear system below, which substitution of unkowns is proper ?
A.substitute 5x16 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 7y4 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:4xy=3 L:4x5=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

2.
so the slope between (2,4) and (c,2) must be 2
(24)/(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
y5 = 13(x+2)
y = 13x + 31
OR
13x  y = 31
5. try it
see which pair has the same slope 
Thank you Reiny