My answer is B

Solve 2x + 3 = 7 (2 points)
Answer

x ≈ -5.19

x ≈ 0.94

x ≈ -0.19

x ≈ 2.81

Question

My answer is B

Solve 2x + 3 = 7 (2 points)
Answer
		
x ≈ -5.19
		
x ≈ 0.94
		
x ≈ -0.19
		
x ≈ 2.81

anonymous · Answer

x=2 :/

anonymous · Answer

Minus three from both sides, then divide both sides by 2.
Then $x=2$

campbell_st · Answer

is this a log question..?

anonymous · Answer

The answer is D because it is approximately 2.

anonymous · Answer

yeah I got x = 2 as well but this is Solving Exponential Equations with Unequal Bases

campbell_st · Answer

so the question is 

$$2^{x + 3} = 7$$

anonymous · Answer

yes

johnweldon1993 · Answer

ahhh...a log question...that makes sense lol...take the logs of both sides

(x+2) log2 = log 7
distribute the log2

then simplify

campbell_st · Answer

take the log of both sides

and using the lag laws for powers you get

$$(x + 3) \log(2) = \log(7)$$

divide both sides by log(2)

$$x + 3 = \frac{\log(7)}{\log(2)}$$

now subtract 3 from both sides

$$x = -3 + \frac{\log(7)}{\log(2)}$$

just type it into a calculator for the answer

johnweldon1993 · Answer

sorry for the typo...i meant (x+3)

do as @campbell_st  has shown :)

anonymous · Answer

-0.19264507794

campbell_st · Answer

thats correct

so it looks like the 3rd choice

anonymous · Answer

thank you xo