anonymous
  • anonymous
Direction varation The amount of money Sharita makes varies directly with the number of hours she works. If she earns $41.25 for 5 hours of work, how much will she earn if she works 8 hours?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
41.25/5 = x/8 (41.25 for 5 hrs = x/8 hrs) cross multiply (5)(x) = (8)(41.25) 5x = 330 x = 330/5 x = 66
anonymous
  • anonymous
understand ?
anonymous
  • anonymous
@kelliegirl33 y 5 first

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anonymous
  • anonymous
@kelliegirl33 can u walk me threw this one Tommy averages one hit for each five times at bat. Use a direct variation formula to determine how many hits would be expected from Tommy after 20 times at bat.
anonymous
  • anonymous
Tommy averages one hit for each five times at bat. Use a direct variation formula to determine how many hits would be expected from Tommy after 20 times at bat.
anonymous
  • anonymous
because we are cross multiplying. Take the numerator of one and multiply it by the denominator of the other one and vice versa. Then solve for the missing variable. 1/5 = x/20 (1 hit for 5 times at bat = x hits for 20 times at bat. cross multiply (5)(x) = (20)(1) do you understand so far ?
anonymous
  • anonymous
can you solve for x now ?
anonymous
  • anonymous
no
anonymous
  • anonymous
(5)(x) = (20)(1) multiply them 5x = 20 now divide by 5 to get x by itself x = 4 understand ?
anonymous
  • anonymous
you only set it up this way if it varies directly, not if it varies indirectly
anonymous
  • anonymous
If it varies indirectly, you have to use inverse proportion

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