ugh i need some math help plz

[chitin]

ok so im going over some simple math, and for the life of me i can not figure this @!#$ out....everything up to this point was smooth (like 5 pages) and it keeps getting harder the further u go lol....(like 20 -30 more pages lmao) so anyway this is the part im stuck on...and theres a 100% chance that after u hopefully help me i will need help again, so il just keep this thread, and check back to help me more il re edit the first post evry time i got stuck....thanks!!!!!!!!!!!!!!!

these 3 the problems that fall into the category...im not sure what this is asking or how to do it... so plz help

Write with no perfect squares under the radical: (no decimals!)
1. √720
2. 3√81
3. 2√5−2√49+2√80

EDIT: heres an addition to confusion

Translate the following sentences into mathematical equations or expressions:
4. Eleven decreased by the quantity four times a number.
5. Nine less than the product of ten and a number d is eleven.
6. Fourteen plus the product of twelve and a number y is less than or equal to fifty.

[Runescapian321]

1. 20*36 = 720, so that 720 can be replaced with that. Then 6 is the root of 36, so now you have 6√20. Then 4*5 = 20. Therefore you have 6√4*5 now. And that can be changed to ANSWER = (highlight) 6*2√5, since 2 is the root of 4, and the answer is 12√5


2. The root of 81 is 9, so that means ANSWER = 3*9 = 27.


3. 49 is a perfect square (7), so after doing that you have 2*7√3√2√80. That means 14√6√80. 80 can be simplified to 16*5, and 16 is a perfect square (4). ANSWER = So now you have 14*4√6√5, meaning 56√30.


Hope I got that right, did that in 6th grade :p

EDIT: After re-reading that, seems hard to follow :\ Basically what you do is, if you can make a perfect square with factors of the number under the radical, do it, and then take the square root of that perfect square and move it outside the radical, and keep going till you can't make any more perfect squares.

[Narcle]

Your last one is wrong Runescapian.

There's a + & - in it.

2√5−2√49+2√80

Simplify 49/80 and you should see how to finish it.

[chitin]

EDIT: After re-reading that, seems hard to follow :\ Basically what you do is, if you can make a perfect square with factors of the number under the radical, do it, and then take the square root of that perfect square and move it outside the radical, and keep going till you can't make any more perfect squares.

okay i sorta get it now but ur using technical linguo...lol umm soo radical = sq root sign right???

perfect sq= 49 (cuz 7*7 = 49)...right?...

factor= the numbers used to make another number such as 5*5 = 25 and 5 would be the factor.....or 5*4=20 soz 5 and 4 would be factors???right???

err sorry lol english linguo seems easy but voted one of the hardest languages to learn =\

[Santa_Clause]

4. 11 - 4Y, where 'Y' is any variable.

5. 10D - 9 = 11, where 'D' is any variable.

6. 12Y + 14 <= 50, where 'Y' is any variable.

[Runescapian321]

Your last one is wrong Runescapian.

There's a + & - in it.

2√5−2√49+2√80

Simplify 49/80 and you should see how to finish it.

:duh: It was midnight and I wasn't thinking straight :p


okay i sorta get it now but ur using technical linguo...lol umm soo radical = sq root sign right???

perfect sq= 49 (cuz 7*7 = 49)...right?...

factor= the numbers used to make another number such as 5*5 = 25 and 5 would be the factor.....or 5*4=20 soz 5 and 4 would be factors???right???

err sorry lol english linguo seems easy but voted one of the hardest languages to learn =\


Perfect square - A number (lets call it A) which 2 equal numbers can multiply and equal A. (ex: 3*3=9, 9 is the perfect square)

Factor - A number that can be multiplied by another to equal something (ex: 10*3=30, the 10 and the 3 are both factors)

Radical - The square root sign

[chitin]

4. 11 - 4Y, where 'Y' is any variable.

5. 10D - 9 = 11, where 'D' is any variable.

6. 12Y + 14 <= 50, where 'Y' is any variable.

gah see i knew this, they just said it wiered...thanks 4 clarifying though

i probably would have written it in order though...but mathematically i would only look silly, but the answer would be the same.