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5 March, 03:02

Write a function rule for the area of a triangle with a base 3 cm greater than 5 times its height. What is the area of the triangle when its height is 6 cm?

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  1. 5 March, 04:28
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    Let the height be x, then base = 5x + 3

    Area = 1/2 x base x height = 1/2 x (5x + 3) = 5/2 x^2 + 3/2 x

    f (x) = 5/2 x^2 + 3/2 x

    for x = 6 cm

    Area = 5/2 (6) ^2 + 3/2 (6) = 5/2 (36) + 9 = 90 + 9 = 99 cm^2
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