msw5805 msw5805
  • 02-02-2017
  • Mathematics
contestada

Four times the sum of a number and 15 is at least 120. Let x represent the number. Find all possible values for x.
Mathematics

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wolffiegirl
wolffiegirl wolffiegirl
  • 02-02-2017
4(x+15)≥120⇔4x+60≥120If we solve for x, we find that x≥15
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