Wednesday

April 16, 2014

April 16, 2014

Posted by **natalie** on Tuesday, September 20, 2011 at 4:27pm.

square root of (2x+1) -5 = 8

I think I take the 5 and add it to the 8 and then I have

square root of (2x+1) = 13

then do I square both sides and end up with 2x+1 = 13^2

2x+1=169

2x+1-1=169-1

2x=168

x=84 am I even close on this?

- pre-calculus -
**Quidditch**, Tuesday, September 20, 2011 at 6:18pmThe best way to check is to substitute your answer back into the equation.

SQRT(2x+1)-5=8

SQRT( (2*84)+1)-5=8

SQRT(168+1)-5=8

SQRT(169)-5=8

13 - 5 = 8

8 = 8

You are correct!

**Related Questions**

pre calculus - 1.) If h(x)= (fog)(x) and h(x) = 3 over the square root of x+3 , ...

Pre Calculus Repost Please Help - Can someone help me solve this problem: cos^2x...

Pre-Calculus - I think I need help with this problem- 3+ square root(x-6) = ...

pre calculus - Hi, I am having a problem trying to find and understanding how ...

pre calculus - Hi, I am having a problem trying to find and understanding how ...

square roots - i know this problem is really easy but i am having a brain freeze...

CALCULUS - I got this problem but its unrelated to any material that we worked ...

Pre Calculus - square root of 3x-4 = (x-4)^2-3 Normally, I either take the ...

Pre-Calculus/Calculus - I am too embarassed to ask this Calculus (really pre-...

pre-calculus - Please diregard the other one the square root sign did not come ...