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Mathematics 16 Online
hulkster123:

geometry

Irregular:

Image??

hulkster123:

jhonyy9:

so just use the Pythagorean theorem - do you know it ?

hulkster123:

i know it but i don't understand it

jhonyy9:

hypotenuse squared = side squared + side squared

jhonyy9:

in this case 20^2 = 15^2 +x^2 find the x value

jhonyy9:

can you calcule the x ?

hulkster123:

give me minute I slow

jhonyy9:

20^2 = ?

jhonyy9:

20*20 = ?

hulkster123:

bruh chill 400

jhonyy9:

ok 15*15 = ?

hulkster123:

225

jhonyy9:

ok 400 = 225 +x^2 subtract from both sides 225 so what will get ?

jhonyy9:

400-225 = 225-225 +x^2

jhonyy9:

make the calcules pls

jhonyy9:

400-225 = ?

hulkster123:

175

jhonyy9:

yes 225-225 = ?

hulkster123:

0

jhonyy9:

ok 175 = x^2 how you find x ?

jhonyy9:

make square root from both sides x = sqrt175 do you can simplifie it ? x = ?

jhonyy9:

x = sqrt175 x = sqrt(25*7) x = sqrt(5^2 *7) x = ?

jhonyy9:

5^2 how come out from square root ?

hulkster123:

bruh chill the freak out I have to write this stuff in my notebook

jhonyy9:

sqrt(5^2) = 5

jhonyy9:

ok ?

jhonyy9:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jhonyy9 x = sqrt175 x = sqrt(25*7) x = sqrt(5^2 *7) x = ? \(\color{#0cbb34}{\text{End of Quote}}\) in this way x = 5sqrt7

jhonyy9:

hope you understand it

hulkster123:

bro f off slow down

jhonyy9:

hnd cya

hulkster123:

@jhonyy9 i only unblocked you because i need help understanding wat you said plus you need to chill and actually explain things in better detail

jhonyy9:

ok ask me

jhonyy9:

@supie can you please explain here - is to late for me

hulkster123:

x = sqrt175 x = sqrt(25*7) x = sqrt(5^2 *7) x = 5sqrt7 explain that what is that?

jhonyy9:

you can write the 175 like 25*7 yes ?

hulkster123:

yea

jhonyy9:

and 25 = 5^2

hulkster123:

uh huh

jhonyy9:

25 = 5*5 = 5^2

jhonyy9:

and sqrt5^2 = 5

jhonyy9:

@Laylalyssa please can you come explain - i gtg

supie:

@aZ

AZ:

Jhonyy did an excellent job so far :) And please be nice to him, he's doing his best to help you :)) But I see that you're confused about the last step So we have \(\sqrt{175} \) As you noted earlier, 175 = 25 * 7 and another way to write 25 is 5^2 So we get \(\sqrt{175} = \sqrt{25 \times 7} = \sqrt{5^2 \times 7} \) Does that make sense so far?

hulkster123:

yee

AZ:

so now you need to know one rule \(\sqrt{a\times b} = \sqrt{a} \times \sqrt{b}\) still following along?

hulkster123:

uh huh

AZ:

So then we have \(\sqrt{25\times 7} = \sqrt{25}\times\sqrt{7}\) Do you know what the square root of 25 is? Basically, what number multiplied by itself will give you 25?

hulkster123:

5

AZ:

Exactly and so now we get \(\sqrt{25} \times \sqrt{7} = 5\times \sqrt{7} = \boxed{5\sqrt{7}}\)

hulkster123:

and that's it? or is there more?

AZ:

That's all!

AZ:

You can use a calculator to multiply 5 and sqrt(7) so you can get an answer as a decimal But it all depends on how they want your answer. \( 5\sqrt{7}\) is the most precise answer

hulkster123:

oh ok thank you are you gonna be on here much longer? cuz I need help with more questions

AZ:

I have to get off for now- have a lot of studying to catch up on. But I'll be back later maybe :)

hulkster123:

it says it is not correct

AZ:

What was the answer that you submitted?

hulkster123:

\[5\sqrt{7}\]

AZ:

In that box, are you able to write \(\sqrt{7}\)

AZ:

Oh your question says round to the nearest tenth

hulkster123:

yes

AZ:

Plug in 5sqrt(7) into a calculator and you'll get 13.229 What is that rounded to the nearest tenth?

hulkster123:

oh oof

hulkster123:

13.2

AZ:

And that's your answer!

hulkster123:

wow thx for the help

AZ:

No problem! Jhonyy did all the hard work :)

hulkster123:

i have 15 more questions

hulkster123:

😭

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