7-6 Live Review

7-6 Live Review

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 $3^{x+5}=15$  

•  $\log_315=x+5$  

•  $\frac{\log15}{\log\ 3}=x+5$  

•  $2.46=x+5$  

•  $-2.54=x$  

Multiple Choice

Q2:  Solve

 $82\cdot\left(3^{2x-4}\right)-110=557$ .  

Round your answer to the nearest tenth.  

• 1.8

• 2.9

• 3.5

• 3

 $82\cdot\left(3^{2x-4}\right)-110=557$  

•  $82\cdot\left(3^{2x-4}\right)=667$  

•  $\left(3^{2x-4}\right)=8.1$  

•  $\log_38.1=2x-4$  

•  $\frac{\log\ 8.1}{\log\ 3}=2x-4$  

•  $1.9=2x-4$  

•  $5.9=2x$  

•  $2.95=x$