Monday

July 28, 2014

July 28, 2014

Posted by **shelley** on Sunday, December 20, 2009 at 6:18pm.

5x+5y=-11

7x-3y=19

The other oneI needed to solve is this Question: 4y+3y<-35

I got -5>-35...is that right?

- Math -
**bobpursley**, Sunday, December 20, 2009 at 6:25pmthe first one does check.

7y<-35

y<-5

- Mathquick??? -
**Sw**, Sunday, December 20, 2009 at 7:03pmAre you sure that the sigh does not change In the second problem? I thought that when you divide by neg then the signs switch?

My instructor told me that the first one was wrong, so I kept going over it and over it, and she insists that it is wrong, unless she wants me to use fractions, but an answer in a decimal form is still considered an integer right?

- Math -
**Reiny**, Sunday, December 20, 2009 at 7:20pmI agree with bobpursley, your first equation solution is correct. It should not matter if you answer as a decimal or fraction of the decimal is exact, which it is.

As to your question about reversing the sign for inequations:

Yes, you do reverse the inequality sign if you multiply or divide by a negative, BUT...

you did not divide by a negative, you divided both sides by +7, so it stays the same.

**Related Questions**

Algebra - - ok... we keep getting this one wrong: Solve the following equation ...

MATH PLZ HELP - well i'm stumped. i can't figure out how to solve this. solve ...

math,correction please.. - (x)/(x-2) - (x+1)/(x) = (8)/(x^2-2x) I keep getting x...

Algebra - I'm trying to learn the difference between conditional and identity ...

Chemistry - One other question that I cannot figure out what I'm doing wrong is ...

algebra - well i'm stumped. i can't figure out how to solve this. solve for (x,y...

Calculus I - Hi, I'm trying to figure this out, but the answer I keep coming up ...

Math - Can someone please help me with this question? I have tried to figure it ...

algebra - Mrs. Stewart has 8 pair of sandals, 6 pairs of pants and 12 t-shirts. ...

jasmine20 - I just wanted to say I have seen you getting better in math as time ...