Saturday

August 23, 2014

August 23, 2014

Posted by **JoniAnne** on Wednesday, October 20, 2010 at 11:50am.

Solve 3 > sqrt(3x)

3x >=o

x>=o/3

x>=0

square both sides and you have 3x < 3^2

3x,9

x<9/3

x<3

answer is 0<=x<3 correct or not?

3(cube) sqrt(2-5) = 3

cube both sides = 2-5x = 27

-5x = 25

x = -5, correct?

Thank you

- Algebra-Please check -
**Henry**, Friday, October 22, 2010 at 7:14pm1. Correct.

2. 3^3*sqrt(2 - 5x) = 3,

27*sqrt(2 - 5x) = 3,

Divide both sides by 27:

sqrt(2 - 5x) = 3/27 = 1/9,

Square both sides and get:

2 - 5x = 1/81,

-5x = 1/81 - 2,

-5x = 1/81 - 162/81,

-5x = -161/81,

Multiply both sides by -1/5:

x = (-161 / 81) * (-1/5) = 161 / 405.

CHECK:

3^3*sqrt(2 - (5*161/405)) =

27*sqrt(2 - 1.9877) =

27*sqrt(0.01235) =

27 * 0.11111 = 3.

**Related Questions**

Algebra-Please check-I'm desperate - Posted by JoniAnne on Wednesday, October 20...

Algebra-Please check my work - Posted by JoniAnne on Wednesday, October 20, 2010...

Algebra-Please check - Please check- sqrt of 2x + 15 = x Answers: -5.3 -3.5 -3 5...

algebra - Can someone please help me with this one? Solve (5x+4)^1/2-3x=0 Just ...

Algebra-Please check - 1. solve sqrt (11-x) = sqrt(x-7) choices are 6,7,8 or9 I ...

Algebra - Solve for s: h=(square root of 3)times s/2 and solve for h V= (pi)r ...

Math - Please Check My Answers - Please help me by checking the following ...

Algebra - Please Solve: 4-x=-5 I thought the answer was -9 but that doesn't seem...

Math check - Solve: sqrt(7x-5)+sqrt(15x+4)=sqrt(30x+31) would I square both ...

Algebra - I have some problems that I am having trouble with and I have some ...