Someone please help me to study for my test with this review packet!! :)

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Someone please help me to study for my test with this review packet!! :)

Algebra
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ill help or shall i say ill try
brb
\[5^{2}+7^{2}=x^{2} under that is, 25+49=x^{2}, below that is \sqrt{79}=\sqrt{x}^{^{2}} what does x^{2}=?\] & thanks ^.^

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I wish I could show a pic, it's Pythagonean and Theorem.
you want to learn pythagoras theorem or u want to know how \(x=\sqrt{79}\) ??
and x^2 = 25+49 = 74
not 79
Sorry I meant 74, but I wanted to know the answer to it because there are 4 answers, 1)6.3 2)7.1 3)14.1 & 4)17.1
then u need to post the entire question clearly....
because sqrt 74 = 8.6
The end of the dog's leash is attached to the top of a 5-foot-tall fence post, as shown in the diagram below (this is where the equation is) The dog is 7 feet away from the base of the fence post.
|dw:1356724058436:dw| whats need to be found ?
if x is to be found, its 8.6
Okay thanks, how about the legs of an isosceles right triangle each measure 10 inches. WHat is the length of the hypothesis of this triangle, to the nearest tenth of an inch?
again pythagoras theorem |dw:1356724579218:dw|
Answers are 6.3,7.1,14.1, and 17.1 Would it be 14.1?
yes :) did u understand how ?
Lol no honestly, I need help, it was just a lucky guess for me because I knew the answer had to have a four in it right?
For any right angled triangle, |dw:1356724844491:dw|
did u get that ?
u had a=b=10 \(c^2=10^2+10^2=200 \\ c=\sqrt{200}=14.1\)
which part u have doubt with ??
Oh okay I see now thanks :) What is the value of x? \[13x-2(x+4)=8x+1\]
So then I would start with 11x-2x+8=8x+1 right?
Then add 2x to both sides? 2x+2x, 2x+8x
-2(4)=-8 and not +8
I'm lost at this part 11x-2x+8=8x+1 +2x +2x 11x+8=10x+1 -10x -10x?
sorry, got disconnected \(13x-2(x+4)=8x+1 \\ 13x-2x\large \color{red}{+8}=8x+1 \\11x+8=8x+1 \\ 11x-8x =1-7 \\ 3x=-6 \\x=....?\) ask if there is any doubt in any step...
I get it so the answer would be 2?
If 3(x+2)-2(x+1)=8 the value of x is? I need help pls.
sorry, i did the same mistake again \(13x-2(x+4)=8x+1 \\ 13x-2x\large \color{red}{-8}=8x+1 \\11x-8=8x+1 \\ 11x-8x =1+8 \\ 3x=9 \\x=3\)
It's okay :)
would be 4 right?
3(x+2)-2(x+1)=8 3x+6-2x-2=8 x+4=4 x=4 yes :)
*x+4=8
Wait for that last one wouldn't it be 2 because 3 goes into 6 twice?
Pls solve this someone has a container with 4200 millilitre of waters are in someone's container
sorry, i didn't get your doubt ? 3x=9 so, x=3
Oh oh I see sorry lol it looked like a 6 for a minute. thanks. How about Debbie solved a linear equation 3(x+4)-2=16 where did she make an error? Line 1: 3(x+4)-2=16 Line 2: 3(x+4)=18 Line 3: 3x+4=18 Line 4: 3x=14 Line 5: \[4\frac{ 2}{ 3 }\]
Oops sorry Line 5 is suppose to say x= then what I put.
3(x+4)=18 x+4 = 18/3 =6
so, mistake in line 3, while distributing.
if more Q coming up, then close this and ask it in a new post...
Okay thanks.
welcome ^_^

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