Math homework help!

[dober_gurl]

Ok it's multi-step inequalities.. .
I don't understand it, I just joined the class because I failed the 2nd semester last year so I'm retaking it. So, basically I forgot or I didn't get it last year. Anyone want to give me a hand?

Here's a problem I did and my answer, I'm pretty sure it's wrong.

-5x - (2x + 3) > 1
                      ¯
10x + -15 > 1
          -15   -15
         -10x > 16
           10  ¯ 10
            x=1.6

[chaos270]

Ok I think i figured it out but i haven't done inequalities for awhile but i looked it up in my old calc book
if the equation is
(-5x) - (2x+3)>= 1  distribute the negative
-5x - 2x - 3 >=1     add like terms
-7x - 3 >=1     add three to both sides
-7x >= 4          solve for x
x <= -4/7

The sign changes because your multiplying or dividing by a negative number
subtracting doesn't change signs

if the -5x and 2x-3 are being multiplied reply and i'll tell you how to do it that way

if you need more help you can IM me at Ponygyrl87 or reply to this I hope this helps

[chaos270]

I'm still in school I should know how to do it but now I over complicate the simple stuff......I'm now in multivariable calculus one of the times i'm asking what have I gotten myself into with an engineering major 

[doglover]

I got the same answer
-5x - (2x + 3) >1
-5x -2x -3 > 1
-7x -3 > 1
-7x > 4
x < -4/7

I got an A in college math

[chaos270]

Yeah distribution is important and remember like terms can be added and subtracted from both sides so the x's can be added or subtracted as well as the constants.

Erin

[newflvr]

I'm now in multivariable calculus one of the times i'm asking what have I gotten myself into with an engineering major

I have a son who is graduating in May in engineering... .and I understand the verbs and the pronouns when we talk.   Everything else is a question mark?....I completely understand!  You have my sympathy! 

My father was an engineer and a son is following in his footsteps..... what did I do wrong???

[doglover]

8 -2 (b+1) < 12 - 3b=  distribute -2 (b + 1)
8 - 2b -2 < 12 - 3b combine like terms = 8 - 2
 6 - 2b < 12 - 3b   get like terms on side by addtion or substraction
-6         -6   =
-2b < 6 -3b   same thing as above
+3b      +3 =
b <6  and there is you answer

I checked it so this should be right.