Homework Help (Math)

[Tasha405]

Hi,
My oldest son who is in the 7th grade has a worksheet full of math problems to do. Well we were able to do most of them except those listed below. Could someone please help us out? I'm sick and really don't even feel like holding my head up so any help would be greatly appreciated. TIA!

Please let us know how you got the answers for these too. :)

1. -6 - 8 = 10

2. -4c + 5 = 9

3. -12r - 48 = 12

4. The sum of 6 times a number n and 5 is 9.

[nanajoanie]

This is Greek to me and I didn't even have to take Algebra. I haven't a clue what you just asked help with. Do you like my dunce cap - it's purple polka dots on orange :D

[kelly12569]

1. -6 - 8 = 10




ok, the -6 is a negative integer

Who came up with those answers? Were they already there for you and you just need to figure our how they got them???

buzz me and we can TRY to figure this out....LMAO I have my daughters math book in front of me trying to find the section on that stuff.

Oh, and WOOHOOOO for Chris bringing his homework home tonight hun!! Woohoo for you toooooo!

[Jaidness]

ok I think ...
2. -4c + 5 = 9
c = -1 cos two negs make a positive so -1x-4=4+5 =9

-12r - 48 = 12 r=-5
-12x-5=60-48=12

now Im not positive about these but hth

[kelly12569]

hey, you could also try this


http://askrose.org/




my step son's resource teacher gave me this website but we havent checked it out yet, ummm because he hasnt been bringing his homework home to do :rolleyes: But maybe it will help you guys out :)

[Blondiex46]

sorry I have no idea.

[Tadbit]

1. I couldn't solve it because there is no letter to solve for.

2. -4c+5=9
-5 -5 (you have to subtract 5 from both sides to get -4c by itself)
-4c=4 (then you have to divide both sides by -4 to get c alone)
c=-1

3. This is the same type of problem. The Golden Rule of Algebra is that you do to one side what you do to the other to get the variable (letter) by itself.
-12r-48=12
+48 +48 (adding the opposite to one side, the same as the other)
-12r=60 (divide both sides by -12)
r=-5

4. I was never good at word problems. I think this is how you set it up.
6n + 5 = 9
-5 -5
6n=4
n=4/6 or 2/3 (don't use a decimal, teachers like fractions because they are more accurate)

I hope this helps.
<3 Kaleena (the daughter that's in pre-calculus :))
Ok hope this helps. I had my 16 year old daughter do it since she has a 4.0 GPA. LOL Me on the other hand.............I know nothing about Algebra. :)

[Tasha405]

I'm sorry, the first problem should be -6n - 8 = 10.

These were already printed up like this and he has to figure them out on his own. Like how they got that answer. I was fine with them until we got to the negative number/whole numbers. They confuse me, big time. :o lol

[Tadbit]

I'm sorry, the first problem should be -6n - 8 = 10.

These were already printed up like this and he has to figure them out on his own. Like how they got that answer. I was fine with them until we got to the negative number/whole numbers. They confuse me, big time. :o lol


-6n - 8 = 10
+8 +8
-6n=18
n=-3

[Tasha405]

Thanks for all the help everyone. I really didn't feel like messing with these problems any longer. Yall are great! :D (((Hugs)))

Yeah Kelly, it shocked me that he was doing it too. It could be that he has to spend an extra hour after school today for detention though. :rolleyes:

Thanks again everyone! :D

[***CUPID***]

I agree with Tadbit on #'s 2 and 3. I took algebra 1 and 2 and geometry in high school. When I got to trigonometry, I QUIT!!! doing math. I changed to another class!!
The answers look right to me, and it all sounds right according to what I learned back in the 90's. LOL