Wednesday

July 23, 2014

July 23, 2014

Posted by **unknown** on Saturday, August 1, 2009 at 10:55pm.

8p+3q-9(8p-5q+9r)

I have gotten lost on this one. Anyone have any ideas? I tried combinging like terms, but I keep getting the wrong answer.

- math -
**MathMate**, Saturday, August 1, 2009 at 11:40pmTo remove parenthses, you need to apply the law of distributivity, which implies:

a(b+c) = ab + ac

for example:

4(2x-3y)

=4.2x - 4.3y

=8x-12y

You need to apply the above rule to remove the only set of parentheses in the given expression, and group like terms (i.e. terms with the same variable names and power) to get the final answer.

Post your answer if you are not sure.

**Related Questions**

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

Math - Hi, I am getting very frustrated. I am doing an online homework for ...

chem - Calculate the solubility of magnesium hydroxide (Mg(OH)2), ksp=1.1x10^-11...

Pre Calculus - So I only have 3 homework questions left and I can't seem to ...

math - problem remove parentheses and simplify 5x-(2x+7) I am getting 3x+7 is ...

Math Urgent - (k+3)^2=(2k-1)^2=0 Please help me solve this equation or maybe one...

english - What is wrong with these sentences then? I have been reading and ...

Algebra 1 - I had a quiz in math. The problem is: |4.3+(-7.2)| I got the answer ...

chemistry - I keep thinking that 3 is the van't hoff factor for ammonium ...

Math analysis - I have a problem that says to Use the laws of logarithms to ...