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EastWind [94]
3 years ago
10

On a recent trip, mary drove 50 miles. what was the average speed at which she drove the 50 miles? (1) she drove 30 miles at an

average speed of 60 miles per hour and then drove the remaining 20 miles at an average speed of 50 miles per hour. (2) she drove a total of 54 minutes.
Mathematics
1 answer:
meriva3 years ago
7 0
110 miles per minute i think
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loris [4]
\measuredangle Q=42

Explanation

Step 1

the sum of the internal angles in a triangle equals 18o, so

\begin{gathered} (2x+16)+(6x-14)+(2x+8)=180 \\ 2x+16+6x-14+2x+8=180 \\ \text{add similar terms} \\ 10x+10=180 \\ \text{subtract 10 in both sides} \\ 10x+10-10=180-10 \\ 10x=170 \\ \text{divide both sides by 10} \\ \frac{10x}{10}=\frac{170}{10} \\ x=17 \end{gathered}

Step 2

now, replace the value of x in angle Q to find it

\begin{gathered} \measuredangle Q=(2x+8) \\ \measuredangle Q=(2\cdot17+8) \\ \measuredangle Q=(34+8) \\ \measuredangle Q=42 \end{gathered}

I hope this helps you

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Olin [163]
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Step-by-step explanation:

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