**Question:**can someone explain how to get answers for there problems?

whats the x-intercept for the line y= -5x-9?

find all solutions to the equation l7x+4l =18

factor the polynomial x^2-5x-36

and solving x^2-9x=36

**Answers:**

y= -5x - 9

*substitute 0 for y when looking for the x intercept, and substitute in 0 for x when looking for the y intercept.*

y= -5x - 9

(0) = -5x - 9

(0 + 9) (+ 9 )

9= -5x

9/ -5 = -5/-5

-1.8 = x

x = -1.8

*FIND ALL SOLUTIONS TO THE EQUATION |7x + 4| = 18 *

|7x + 4| =18

7x + 4 = 18 7x + 4 = -18

(-4) (-4) (-4) (-4)

7x = 14 7x = -22

7x /7 14/7 7x/7 -22/7

x = 2 x = 3.1428571 (repeat sign on the last digits, i dont know where it is on the keyboard)

* THE OTHER ONES, YOUR SCREWED. *

* HOPE THIS HELPED! if i did...GIMME BEST ANSWER!*

wow..lotsa questions..

anyway:let's try:

x- intercept- meaning the point in the line where the y = 0

so making y = 0

y = -5x - 9

0 = -5x - 9

5x = -9

x= -9/5---> answer x intercepet

|7x + 4| = 18

remember |n| = n, -n

so trying -n

-7x - 4 = 18

x = - 22/7--> ist ans

trying n

7x + 4 = 18

7x = 14

x = 2 ---> 2nd ans

next:

x^2 - 5x - 36

try to get the perfect square, you will get:

(x - 9) (x + 5) -- answer

last:

x^2 - 9x = 36

factoring out: you get

(x -12)(x + 3)

so:

x = -3, x = 12 ---answers

hope this helps

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