Question

Write the equation of the line parallel to x = -16 and passes through the point (9, -10).

Answer 1

parallel=same slope

Answer 2

y=-16x+b

Answer 3

-10=-16(9)+b. Solve for b

Answer 4

-10=-144+b
134=b

Answer 5

equation is x = -16 gandalfwiz not y = -16

Answer 6

:p me stupid

Answer 7

that's ok, the answer is actually x = 9 since this is also a vertical line but it passes through (9,-10)

Answer 8

how do you do this one? Write the equation of the line perpendicular to 9x + 2y = 18 and passes through the point (1, 4).

Answer 9

That's when you do it my way :). get your first equation into y=mx+b form, then follow my steps above

Answer 10

9x+2y=18
2y=-9x+18
y=-4.5x+9

Answer 11

perpendicular= negative reciprocal slope

Answer 12

The negative reciprocal is the number flipped upside down and multiplied by a negative.

Answer 13

-4 1/2=-9/2

2/9

Answer 14

Now u have y=2/9x+b

Answer 15

plug in your point for the y and x

Answer 16

4=2/9(1)+b
4=2/9+b
4-2/9=b

Answer 17

Since 4- 2/9 gives you tons of decimals, I'd leave it like that. Your equation is y=2/9x+(4- 2/9)

Answer 18

a. 9x - 2y = 1
b. 9x + 2y = 17
c. 2x - 9y = -34
d. 2x + 9y = 38

Answer 19

which one?

Answer 20

of course, you can combine 4-2/9 to get 34/9

Answer 21

choice C

Answer 22

another way to do it is swap the x and y coefficients and change the sign. From there, plug in x=1 and y=4 to find the right hand side

Answer 23

can you start from the beginning please i am so confused

Answer 24

sure, one sec

Answer 25

thanks :)

Answer 26

start with 9x + 2y = 18


ANY line perpendicular to this will be of the form

2x-9y = C

where C is any number


All I did here was swap the x and y coefficients 9 and 2 and then I changed the sign of the final y coefficient

Answer 27

So we now have 2x-9y = C


Since this perpendicular line must go through (1,4), this means that x=1 and y=4


Plug these values in the equation above to get


2x-9y = C

2(1)-9(4) = C

2-36 = C

-34 = C

C = -34


So the equation of the perpendicular line that passes through (1,4) is


2x-9y = -34

Answer 28

does that make sense?

Answer 29

where did you get 1 and 4

Answer 30

from the point (1,4)

Answer 31

that the perpendicular line must pass through

Answer 32

o okay got it thanks!

Answer 33

great, np