## anonymous 4 years ago can someone please help get the answer Solve 2^(x + 3) = 7 Answer a.x ≈ –5.19 b.x ≈ 2.81 c.x ≈ –0.19 d.x ≈ 0.9

1. anonymous

You can simplify it better by: 2^x + 2^3 = 7 Or go to http://www.wolframalpha.com/input/?i=solve+2^%28x%2B3%29%3D7 The answer is C.

2. anonymous

I havent done "log" in a looooong time, so sorry i cant help with that part

3. anonymous

@sam that should be "2^x *2^3" and not '+'.

4. anonymous

right, sorry

5. anonymous

np

6. anonymous

$2^{x} \times 2^{3} = 7$

7. anonymous

I GOT IT!! Ok, so: $2^{x} \times 8 =7$ $2^{x}= 7/8$ $x=\log(7/8) \div \log(2) ; x=-0.19$