Solve multi-variable formulas for a specific variable in order to solve some word problems.
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Problem

The area, A, of a trapezoid is calculated using the formula A, equals, start fraction, 1, divided by, 2, end fraction, left parenthesis, b, plus, c, right parenthesis, h, where h is the height of the trapezoid and b and c are the bases of the trapezoid.
Rearrange the formula to solve for h.
h, equals
What is the height of a trapezoid with one base equal to 20, space, m, the other base equal to 7, space, m, and an area of 135, space, m, start superscript, 2, end superscript ?
Round your answer, if necessary, to the nearest hundredth.
h, equals
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, p, i or 2, slash, 3, space, p, i
m