Math by MemVerseFanatic | Subject: Direct and Inverse Variation
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Created by:
MemVerseFanatic on February 9, 2012
Subjects:
BigKidsLearnHere, math, by MemVerseFanatic, direct variation, inverse variation, direct and inverse variation, Math by MemVerseFanatic
Classes:
Westminster 7th Grade, ★★★THE COOLEST STUDY GROUP EVER!★★★, ★★★Every MATH BY MEMVERSEFANATIC set!★★★
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8 terms
English | Math / Symbols |
|---|---|
 170 | The number of revolutions per minute (RPM) varies inversely as the number of teeth of a gear. A certain gear that had 51 teeth resulted in 140 RPM. After the 51-tooth gear was replaced the one that had 42 teeth, how many RPMs did it do? |
| 200 | The number of revolutions per minute (RPM) varies inversely as the number of teeth of a gear. A certain gear that had 50 teeth resulted in 100 RPM. After the 50-tooth gear was replaced the one that had 25 teeth, how many RPMs did it do? |
| 21 | The number of birds varied directly as the number of bird feeders. When there were 7 feeders, there were 302 birds. When some more feeders were made, the number of birds increased to 1208. How many bird feeders were added? |
| 3 1/5 | The volume varied inversely as the pressure. When the pressure was 1 1/3 atmospheres, the volume was 6L. How many atmospheres of pressure would be needed to compact the volume to 2½L? |
| 180 | The number of people at the beach in varied directly as the temperature. When the temperature was 60⁰F, there were 120 people. Later on that day, the temperature rose to 90⁰F. How many people were there then? |
| 1.5 | If a 2 results in a 3, what will a 4 result in if the variation is inverse? |
| 2093 | If a 3 results in a 7, what will an 897 result in if the variation is direct? |
| 8.4 | If a 3.6 results in a 2.1, what will a 3 result in if the variation is inverse? |
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