Question

can someone quiz me on algebra?

Answer 1

That is a big subject. Did you have something in mind?

Answer 2

um. parellel and perpendicular lines. like tell if an equation is parallel, perpendicular or neither.

Answer 3

quetions like that

Answer 4

im trying to practice for the interim so any question is basically good

Answer 5

No problem. First how do you tell if an two lines, given their equations, are parallel or perpindicular?

Answer 6

if they're parallel then they will have the same slope but different y-intercepts. if they're perpendicular then they'll have opposite reciprocal slopes.

Answer 7

You got it so tell me if these two equations are parallel, perpindicular, or neither

\[y=12x+4\]\[y=144x/12+13\]

Answer 8

neither

Answer 9

Try again

Answer 10

aw

Answer 11

What is the equation of the line:
perpendicular to the line 4x + 5y - 20 = 0
and
passing through the point (8, -3)?

Answer 12

if u divide 144 by 12 its 12 so it cant be..ooohh.its parallel

Answer 13

You got it! Now try abbOt's

Answer 14

i am

Answer 15

so i solved 4x5y-20=0 and got y=-4/5x+4

Answer 16

is it right so far?

Answer 17

slope, yes.

Answer 18

is the y-intercet right?

Answer 19

yes...

Answer 20

wart?

Answer 21

and im not sure abut all those dots after ye

Answer 22

yes

Answer 23

wat did u mea by "is it y-intercept"?

Answer 24

but either way then i substituted x and y with the point (8,-3)

Answer 25

oih if it was right

Answer 26

well, what did you get as the equation of the line perpendicular?

Answer 27

i still havnt finihed it. im making sure im doing it right so far.

Answer 28

so i plugged in the points. i have -3=-4/5x8+4

Answer 29

then i got -3=-32/5+4

Answer 30

is it right so far?

Answer 31

Not quite.

Answer 32

whats wrong?

Answer 33

am i not supposed to have the 4?

Answer 34

your slope is not quite correct.

Answer 35

for the first part of the equation. It should be perpendicular.

Answer 36

so i should flip the slope before i plug in the points?

Answer 37

i might be getting it but i want to know if i put 4 or b in the second part.

Answer 38

i think its b now that i look at it

Answer 39

so the equation would be y=5/4x-13

Answer 40

The gradient of any line perpendicular to the line 3x-2y+12=0 is
\[a)\frac{3}{2}\]
\[b)-\frac{3}{2}\]
\[c)\frac{2}{3}\]
\[d)-\frac{2}{3}\]
Multiple choice. Choose the correct answer.

Answer 41

whats gradient?

Answer 42

gradient=slope.