geometry help

a trapezoid has base lengths of 4 and 19 feet, with an area of 115 square feet. what is the height of the trapezoid?

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  1. 115=height*(4+19)/2

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  2. 115=x(4+19)/2
    115/11.5= 11.5x/11.5 x=10
    Height= 10

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  3. 42ft 56 ft 111ft

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