Question

Use the given intercepts to determine the correct equation of the line.
9x + y = 20

5x + 4y = 9

4x + 5y = 20

4x - 5y = 9

y-intercept (0,4) x-intercept (5,0) plz just give answer I need it right away

Answer 1

find the slope first by using the slope formula...
slope(m) = (y2 - y1) / (x2 - x1)
(0,4)..x = 0 and y = 4
(5,0)..x = 5 and y = 0
now we sub
slope(m) = (0 - 4) / (5 - 0)
slope(m) = -4/5

now we use y = mx + b
slope(m) = -4/5
use either of your sets of points...(5,0)..x = 5 and y = 0
now sub
0 = -4/5(5) + b
0 = -4 + b
4 = b
so the equation is : y = -4/5x + 4
now we will put it in standard form Ax + By = C
y = -4/5x + 4 --- multiply everything by 5 to get rid of the fraction
5y = -4x + 20 -- add 4x to both sides
4x + 5y = 20 <== standard form equation

Answer 2

@kelliegirl33 i need help

Answer 3

get off my question you can message her >:

Answer 4

ohh who asked YOU

Answer 5

I will be with you in a second lala...hold on.
lisa, do you have any questions ?

Answer 6

ok

Answer 7

Nobody asked dicchead , , and yess I do

Answer 8

watch your language

Answer 9

DICCHHEAD IS RIGHT HERE

Answer 10

whats your question lisa

Answer 11

@kelliegirl133 I don't need your help if you're gonna tell me to watch my language like im a little retricekid . I am a junior not a 6th grader

Answer 12

doesn't matter what age you are...there are younger kids on this site and you are not setting a very good example.

Answer 13

I understand..I get upset too and may say some bad things....but I can control my language on a site such as this. Thats just being mature

Answer 14

now if you want, I can answer some questions that you might not understand ? Its up to you ?

Answer 15

I don't care you disrespect you get disrespected point blank period .

Answer 16

I admit Lisa should not have jumped in on your question to ask a question, but there was no need for that language. You could have just mentioned to her that it was not cool to do that

Answer 17

oops...lala

Answer 18

no thanks hop off my question boo (peace) Don't need your lecture

Answer 19

i didint do anything i just asked for help to you it was none of her bussiness

Answer 20

good luck figuring out your math :)