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Alenkinab [10]
3 years ago
11

PLEASE HELP ME

Mathematics
2 answers:
Crank3 years ago
8 0

Answer:

x  = (ln (9)-5) /3

Step-by-step explanation:

e^3x+5=9

First we subtract 5 from each side

e^3x+5-5=9-5

e^3x=(9-5)

Then we take the natural log of each side

ln(e^3x) = ln(9-5)

3x = ln (9-5)

Then we divide by 3 on each side

3x/3  = ln (9-5) /3

x  = ln (9-5) /3

erik [133]3 years ago
6 0

Answer:

x=\frac{-5+ln9}{3} which appears to be from the list x=ln9-5/3

Step-by-step explanation:

We take the natural logarithm of both sides as the inverse operation to an exponent on e. This allows us to use log rules to rearrange the problem.

e^{3x+5}=9\\lne^{3x+5}=ln9 \\(3x+5)lne=ln9

We know that as inverse operations, ln e =1.

(3x+5)(1)=ln9\\3x+5=ln9\\3x=-5+ln9\\\frac{3x}{3}=\frac{-5+ln9}{3}

x=\frac{-5+ln9}{3}

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Ede4ka [16]

The total cost when 881 minutes is used is $477.50.

<h3>What are the equation that model the question?</h3>

a + 480b = 277 equation 1

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  • b = variable fee

<h3>What is the flat fee and the variable fee?</h3>

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