Question

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

Answer 1

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.

Answer 2

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

Answer 3

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

Answer 4

right, sorry

Answer 5

np

Answer 6

\[2^{x} \times 2^{3} = 7 \]

Answer 7

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