Posted by **lee** on Sunday, October 31, 2010 at 11:00pm.

Hello Reiny, please check these problems for me and if they are not right WOULD YOU PLEASE HELP ME WITH THE CORRECT ONES THANKS!!!

1. Slove for X, wher X is the real number, square root 5x + 9= square root 9x + 13= 27

2. Find the value: ^3 square root -27= 9

3. Write the following in simplified radical form ^4 square root 80= 4

PLEASE HELP QUICKLY!!

- Algebra -
**Reiny**, Sunday, October 31, 2010 at 11:08pm
1 . I assume you meant

√(5x+9) = √(9x+13)

if so, then square both sides

5x + 9 = 9x + 13

-4x = 4

x = -1, the answer checks in my equation

2. I can't figure out what you are saying.

are you finding the cuberoot of -27 ?

if so, the cuberoot of -27 = -3

3 again, is that supposed to the fourth root of 80 ?

80^(1/4) = (16)^(1/4) (5)^(1/4)

= 2 times cuberoot of 5

- Algebra -
**Reiny**, Sunday, October 31, 2010 at 11:10pm
last line should have said

2 times fourthroot of 5

- Algebra -
**lee**, Sunday, October 31, 2010 at 11:15pm
THANKS AGAIN Reiny!!

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