If Sonia practices piano for 1/3 of an hour each day,how long will she have practiced in a week

1 answer:

5 0

Answer:

2 hours and 20 minutes

Step-by-step explanation:

1/3 of an hour is 20 minutes and a week is 7 days. Multiply 20 minutes by 7 days. You get 140 minutes which equals 2 hours 20 minutes

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nadezda [96]

Answer:

$\frac{5}{2}$

Step-by-step explanation:

First, add two to both sides to get $9^{x-1}=27$

There are two ways to solve this from here

Think about what power you would have to raise 9 to to get to 27. $9^{\frac{1}{2}}$ = 3 and $3^3=27$ . So, multiplying the powers (because it is a power to a power) you get $9^{\frac{3}{2}}=27$ . This means that $x - 1 = \frac{3}{2}$ or x = $\frac{5}{2}$ .
Take the log of both sides.