Which equation is true?

- anonymous

Which equation is true?

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- jamiebookeater

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- anonymous

a. https://static.k12.com/bank_packages/files/media/mathml_cb5d5b7a1e66a1293db43ccc47c8cfdbbf61fdab_1.gif

- anonymous

b. https://static.k12.com/bank_packages/files/media/mathml_ba2542bc4950216035c312c4d7b6ed9f2ce01bfe_1.gif

- anonymous

c.https://static.k12.com/bank_packages/files/media/mathml_62fb6e098c7ece15f83bfc5d40e5b3f1f200a088_1.gif

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## More answers

- anonymous

d.https://static.k12.com/bank_packages/files/media/mathml_e67319f690c00e0c2cb7149af5b412244799f48f_1.gif

- anonymous

im having trouble with this i will fan and medal for help

- anonymous

@Photon336 @ganeshie8

- sloppycanada

Alright, this is actually pretty simple. Well simple-ish.

- anonymous

ok

- sloppycanada

Start with A.
|dw:1446792532053:dw|

- sloppycanada

Now, do you have a calculator?

- anonymous

ok

- anonymous

yep have one on my computer

- sloppycanada

Alright, so the first thing you want to do is simplify both sides. So divide 529 by 2.

- sloppycanada

And then the square root of 529.

- anonymous

ok

- anonymous

264.5

- sloppycanada

|dw:1446792612656:dw|
Now obviously these two are NOT the same.

- anonymous

ohhhh nvm

- sloppycanada

So now we can cross of A as an answer since we know that it is not equal.

- anonymous

ok

- sloppycanada

The next one is |dw:1446792757101:dw|

- anonymous

ok what do i do now?

- sloppycanada

Obviously, if the first one 529/2 was wrong, multiplying it will not make it right.

- anonymous

ok

- anonymous

i went ahead and gave you a medal for helping me as soon as you could

- sloppycanada

|dw:1446792810879:dw|
And since when you square root something, you're making the number smaller, we can eliminate B from our answer pool.

- sloppycanada

Do you understand so far? And thank you.

- anonymous

yea im getting it

- anonymous

well i should say im understanding it (and your welcome)

- sloppycanada

Great! Moving on to C - do you know what the square root of 529 is?

- anonymous

no

- sloppycanada

That's why we have a calculator. So go ahead and plug in the square root of 529

- anonymous

so i divide right?

- sloppycanada

No. Look for a simple that looks like \[\sqrt{}\]

- anonymous

im on a cromebook i dont have one of those

- anonymous

wait be righr back

- sloppycanada

https://www.mathway.com/

- anonymous

nvm i found one on google

- anonymous

23

- sloppycanada

Alrighty, using whatever method you want to, find me the square root of 529, I recommend mathaway, as it is a very helpful site.

- anonymous

ok

- anonymous

the square root is 23 right

- sloppycanada

So now that you know the left side of C, you can figure out the rest.
|dw:1446793343547:dw|

- anonymous

k

- sloppycanada

So just a note, when you have
|dw:1446793426875:dw|
they want you to multiply something by itself. So in our case, 23 x 23.

- anonymous

ok

- FaireGaming

23 To the 2nd power is the same as the start :P

- sloppycanada

We don't want to bother doing that in this case, since we also have a square root. So yeah,
23.

- sloppycanada

That means that the correct answer to your problem is C.
Since both sides are equal.
23 = 23
\[\sqrt{529}=\sqrt{23^2}\]

- anonymous

ok thanks a lot

- anonymous

@sloppycanada your a lifesaver

- sloppycanada

Haha thanks, I hope you understand this type of problem a bit better now.

- anonymous

i do now by a whole lot

- anonymous

hey do you think maybe you could help me a lot more in the future

- anonymous

at least i got this question right

- sloppycanada

Haha, if you were concerned with the other questions, I could've helped you out.

- anonymous

WHY AM I NOT SMART :(

- anonymous

oh :3 again im not smart the only problem is is ive failed this test 3 time and this question was the one bugging me

- anonymous

ok im going to close this lesson now @sloppycanada

- sloppycanada

Okay, sounds good.

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