I need help on 7 grade math homework! dave F is really good at this! plz answer?

Topic: Math homework videos

June 16, 2019 / By Sal

Question:
#1 used video games cost $25 each. write an expression to find out the cost of m video games #2: Sal earned $740 for n weeks of work. Write an expression for the amount he earned each week please answer!

Originally Answered: I need help on 7 grade math homework! dave F is really good at this! plz answer?
You can say that "the second power" is written as ^2 or if it's to the forth power ^4, ect.
so q^2+2q=2q^2
Plug in both 1 and 2, and see which one is correct.
1^2 +2(1)= 2(1)^2
1+2=4 incorrect.
2^2+2(2)=2(2)^2
4+4=8 correct
So it's 2.

Originally Answered: I need help on 7 grade math homework! dave F is really good at this! plz answer?
This is the initial equation : q^2 + 2q = 2q^2
Bring the q^2 to the other side and you get: 2q = 2q^2 -q^2
This simplifies to : 2q = q^2
Divide both sides by q and you get : 2=q
Just a little hint when you have a couple of answers, why don't you substitute in what you think q equals and see if it works.
Check : sub q=2 into original equation
2^2 + 2x2 = 2x2^2
4+4=2x4
8=8 which means q=2 works

If you have your own answer to the question math homework videos, then you can write your own version, using the form below for an extended answer.
Please enable JavaScript to view the comments powered by Disqus.