Question

HELP !!
If the lines 4y+2x = -5 and 3y +ax = -2 are perpendicular, what is the value of a ?

Answer 1

@Shido88 May I help you with this question?

Answer 2

Of course !!

Answer 3

Great! You must first transform the the equation 4y+2x = -5 into slope intercept form. Do you know how to do that?

Answer 4

isn't it ax+b ?

Answer 5

yes it is. so subtract 2x from the left side and divide all the terms by 4 to get y=ax+b

Answer 6

ok hold on

Answer 7

y= -2x -5/ 4 ?

Answer 8

y= -1/2x - 5/4

Answer 9

you forgot to divide -2x by four.

Answer 10

oh i see

Answer 11

got it! what next ?

Answer 12

great! now that you have that equation, you know that the first slope is -1/2. do you follow? : )

Answer 13

so what would be the slope of the perpendicular equation?

Answer 14

yes

Answer 15

2/1 ?

Answer 16

yes or just plain 2 :) Give me one second and i will tell you the last part.

Answer 17

sorry for the delay

Answer 18

sure! take your time!

Answer 19

my goodness. one second. i'm lost i thought i remembered doing this.

Answer 20

aha it's ok, im here all day !

Answer 21

haha all right im sorry about that

Answer 22

^^

Answer 23

i'm going to repost this question for you. i will talk you in the post.

Answer 24

sure