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Question

After four days, Trudy's average exercise time was 45 minutes per day. If she exercises 60 minutes on the fifth day, what will be her average time in minutes per day after five days?

Solution

VerifiedAnswered 2 years ago

Answered 2 years ago

Step 1

1 of 2Determine the total number of minutes for four days.

$\begin{gather*} 45 \cdot 4 = 180 \end{gather*}$

Determine the new average time in minutes with the given time on the fifth day. Let $m$ be the new average time.

$\begin{align*} (180 + 60) \div 5 &= m && \text{Write an equation}\\ 240 \div 5 &= m && \text{Perform operation inside the parentheses}\\ 48 &= m && \text{Divide the values} \end{align*}$

The new average time is 48 minutes per day.

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