2007-11-27 01:22:12 · 4 answers · asked by blondie42 1 in Science & Mathematics ➔ Mathematics
REMEMBER that slopes of parallel lines are equal.
Hence slope of line through (4,11) and (1,y) = 2
slope formula = diffrence of y- co-ordinates/ respective difference of x co-ordinates.
Hence, slope = (y - 11)/(1-4) = 2
therefore y - 11 = 2(-3) = -6
=>y = -6 + 11 = 5
therefore y = 5.
2007-11-27 01:32:11 · answer #1 · answered by madee 2 · 7⤊ 1⤋
parallel lines have the same slop, so use the slope formula:
2 = (y-11)/(1-4)
2 = (y-11)/(-3)
-6 = y - 11
y = 5
that's it!
2007-11-27 01:32:48 · answer #2 · answered by Marley K 7 · 5⤊ 1⤋
(4,11)(1,y)
(y-11)/(1-4)=2
(y-11)/-3=2
Multiply both sides by -3:
y-11=-6
Add 11 from both sides:
y-11+11=-6+11
y=5
Check:
(5-11)/(1-4)=2
-6/-3=2
2=2
I hope this helps!
2007-11-27 01:50:12 · answer #3 · answered by Anonymous · 4⤊ 1⤋
(y - 11) / (1 - 4) = 2
y - 11 = - 6
y = 5
2007-11-27 03:28:12 · answer #4 · answered by Como 7 · 6⤊ 1⤋