anonymous
  • anonymous
Steve has these score on the exams for this semester: 89, 92, and 87. How much will have to make on the fourth exam to have a final average of an A (a 92% or better)?
Mathematics
schrodinger
  • schrodinger
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saifoo.khan
  • saifoo.khan
Hey.
saifoo.khan
  • saifoo.khan
Let x represent his score on the fourth exam (89 + 92 + 87 + x)/4 ≥ 92 in order to get an A 268 + x ≥ 92*4 x ≥ 368 - 268 x ≥ 100
anonymous
  • anonymous
Thats not one of my answers though

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saifoo.khan
  • saifoo.khan
Wait? why? what options do u have?
anonymous
  • anonymous
A.100% B.98% or better C.96% or better D.90% or better Would it be 100? Im not good at this as you can tell...
saifoo.khan
  • saifoo.khan
Yes, it's A.
anonymous
  • anonymous
help me on something else?
saifoo.khan
  • saifoo.khan
Would love to.
anonymous
  • anonymous
|dw:1327527735835:dw| A.Add 3 to each side. B.Subtract 3 from each side. C.Divide each side by 7. D.Multiply each side by 7.
saifoo.khan
  • saifoo.khan
We have to get rid of 7, so what we will do it multiply 7 on both sides.
saifoo.khan
  • saifoo.khan
This will cancel out 7 on the left side.
anonymous
  • anonymous
oh ok :) your really good at Inequalities.
saifoo.khan
  • saifoo.khan
Thankyou!! (:
saifoo.khan
  • saifoo.khan
i like algebra though. specially college one.
anonymous
  • anonymous
awesome

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