Posted by **jessica** on Thursday, June 29, 2006 at 1:39am.

2^x+20=15+3^x

A)1

B)16

C)-5

D)25

I chose c but i got it wrong i am having a problem understanding it.

Let me rewrite the question in a more standard format.

2* sqrt(x)+20=15 + 3*sqrt(x)

where * means multiply, and sqrt means the square root. Your use of ^ for square root is unusual, normally, we use the carat sign, ^, as an exponent..for instance, 2 cubed will be 2^3.

Ok, your problem.

2* sqrt(x)+20=15 + 3*sqrt(x)

gather your terms..

2* sqrt(x)- 3*sqrt(x) =15 - 20

- sqrt(x)=-5

square both sides...

x=25

## Answer This Question

## Related Questions

- algebra 2 - Science and medicine. Find the time required for an object to fall ...
- algebra - I asked a question and it was answered by Steve. He had the numbers ...
- Algebra - I have some problems that I am having trouble with and I have some ...
- math,algebra,help - Directions are simplify by combining like terms. x radiacal ...
- Math/Calculus - Solve the initial-value problem. Am I using the wrong value for ...
- algebra - Jason has volunteered at the pet shelter 3 more times than Keith. ...
- Math - I'm using the quadratic equation and I understand how to use it, but the ...
- Calculus - Please look at my work below: Solve the initial-value problem. y'' + ...
- MATH - I need to simply this equation, but I got stuck. h/(4-sqrt(16+h)) = y ...
- Algebra - 1)A bookshelf holds 4 mysteries, 3 biograpghies, 1 book of poetry, and...

More Related Questions