Here is the question:
"Which pair of equations below represents lines that are parallel?
A. y =1/5x - 5
y = -5x + 2
B. y = 2/3x
y = 2/3x - 4
C. x + y = 4
x + 2y = 8
D. y = 3x - 4
y = 5x + 2
I am taking a test that is worth ALOT of my grade. Thanks
2007-12-10 06:09:38 · 12 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
people im only in 8th grade and im 13 so please dont insult if its to easy. thanks
2007-12-10 06:18:33 · update #1
B. y = 2/3x
y = 2/3x - 4
Same slope of 2/3
2007-12-10 06:12:19 · answer #1 · answered by Mavis 5 · 3⤊ 0⤋
B. y = 2/3x
y = 2/3x - 4
cauz the pent chould be the same in the parallel the pent is the number who come before the x the form of equation is Y=aX+b a= pent that is prnt of the first equation is a=2/3 and the second a=2/3 so they are parallel
A. y =1/5x - 5
y = -5x + 2
in this 2 equation the first is a=1/5 and the second is a=-5 so they are differents so they are not parallel
C. x + y = 4
x + 2y = 8
it should be resorder the equation to be in the form of Y=aX+b so the first will be y=-x+4 the second one will be y=-1/2x+4
so the first pent is a=-1 and the second is a=-1/2 are diferents so thet are not parallel
D. y = 3x - 4
y = 5x + 2
the first pent is a=3 and the second is a=5 are diferents so thet are not parallel
2007-12-10 14:21:48 · answer #2 · answered by c.u.t.e_m.!.r.0 m 2 · 0⤊ 0⤋
The answer is B, because the slopes of the lines are exactly the same (i.e 2/3)
Except for Answer C, all of the lines are represented by the slope-intercept form:
y = mx + b
If two lines have the same slope (m), then they are parallel no matter what their y-intercept values (b) are
2007-12-10 14:17:32 · answer #3 · answered by The K-Factor 3 · 0⤊ 0⤋
Parallel means that they have the same slope. Your equations are in slope intercept form. So, that answer is B because they have the same slope of 2/3. Different slopes will not be parallel.
2007-12-10 14:14:29 · answer #4 · answered by buzz_e_me 2 · 0⤊ 0⤋
B. The slopes are the same...2/3.
2007-12-10 14:14:12 · answer #5 · answered by WT 4 · 0⤊ 0⤋
man i love doing that type of math and im not even a nerd or anything. jus make sure there all in y equal form (y=mx+b). if they got the same slope then there are parallel
2007-12-10 14:20:11 · answer #6 · answered by EZ C 3 · 0⤊ 0⤋
B
the generic formula of a line is y = mx + c
where m is the gradient and c is the y-intercept
parallel lines must have the same gradient,
B is the only one with equal m-values (gradient)
2007-12-10 14:13:11 · answer #7 · answered by mountainpenguin 4 · 1⤊ 0⤋
B because they have the same slope. Y=mx+b
M= slope
x=x
y=y
B=Y-intercept
If you want perpendicular, then you have to flip the top and bottom number and switch the sign.
2007-12-10 14:13:45 · answer #8 · answered by TidusJames 1 · 0⤊ 0⤋
B. parrallel lines have the same slope.
2007-12-10 14:13:14 · answer #9 · answered by i_can_be_your_hero 4 · 1⤊ 0⤋
Hunnie, Go do your homework or ask your mommy or daddy too
2007-12-10 14:12:06 · answer #10 · answered by Anonymous · 3⤊ 1⤋