An isosceles triangle has legs that are represented by the expression 7x – 8 and has a base
represented by the expression 6x – 4.
a. draw a diagram to represent the situation.
b. write and simplify an expression representing the triangle's perimeter.

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yx = 36

step-by-step explanation:

cos f = opposite side/ hypotenuse

cos f = yw / yx

we know cos f = 4/9 and yw =16

4/9 = 16/yx

multiply each side by yx

4/9 yx = 16/ yx * yx

4/9 yx = 16

multiply each side by 9/4

9/4 * 4/9 yx = 16 *9/4

yx = 36