7-6 Live Review Lesson Slides: 3 Slides

3 Slides • 2 Questions

1

7-6 Live Review

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2

Fill in the Blanks

Q1: Solve: $3^{x+5}=15$
Round your answer to the nearest hundredth.

Type answer...

3

$3^{x+5}=15$

$\log_315=x+5$
$\frac{\log15}{\log\ 3}=x+5$
$2.46=x+5$
$-2.54=x$

4

Multiple Choice

Q2: Solve

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

Round your answer to the nearest tenth.

1

1.8

2

2.9

3

3.5

4

3

5

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

$82\cdot\left(3^{2x-4}\right)=667$
$\left(3^{2x-4}\right)=8.1$
$\log_38.1=2x-4$
$\frac{\log\ 8.1}{\log\ 3}=2x-4$
$1.9=2x-4$
$5.9=2x$
$2.95=x$

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