Saturday

April 18, 2015

April 18, 2015

Posted by **Miley** on Monday, May 19, 2008 at 7:34pm.

2e^-x+4=21. how do i do this problem.

i know that you subtract 4, but what do you do after that?

- alg 2. -
**Damon**, Monday, May 19, 2008 at 7:50pm2e^-x+4=21

2 e^-x = 17

e^-x = 17/2

1/e^x = 17/2

so

e^x = 2/17

take natural log of both sides

x = ln (2/17)

- alg 2. -
**Miley**, Monday, May 19, 2008 at 8:02pmcan you please show me how you got e^x=2/17. thanks

- alg 2. -
- alg 2. -
**Damon**, Tuesday, May 20, 2008 at 8:00pmin general

a^-b = 1/a^b

**Answer this Question**

**Related Questions**

Mathematics concepts - Matthew sits at his desk unable to figure out the answer ...

math concepts - Matthew sits at his desk unable to figure out the answer to a ...

Pre Calc - use properties of the trigonometric function to find the exact value ...

Math - I am putting < for the square root abbreviation. I don't know how to ...

alg 2 - evaluate cot 11 pie/6 to the nearest hundred angle given in radians.. is...

Alg.2 - find all zeros of the function. f(x) = x^3-10x^2+33x-34 I found 2, using...

Physics - A rock is dropped from a height of 100m. a) how long does it take to ...

Trigonometry college - Use a calculator to solve csc (theta) = -3. I know the ...

MATH! HELP!!! - I am putting < for the square root abbreviation. I don't know...

trigonometry - Use fundamental Identities to find the exact value of the ...