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13.01.2021 •
Mathematics
The table shows the numbers of snare drum backbeats and bass guitar notes in a disco tune.
Snare Drum Backbeats
Bass Guitar Notes
3
2p
60
90
120
80
Are the two quantities proportional? Explain.
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proportional. All the ratios of notes to backbeats are
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Ответ:
Total distance-distance covered
150-60=90 mi
Now, we need to find the average speed they need to travel per hour to reach the destination in 2.5 (2 1/2) hours.
90 mi/2.5 h=36 mi/h
They must travel at an average speed of 36mph to reach their destination in 2 1/2 hours.
Check:
60+36(2.5)
=120 mi