Find the area of the semicircle. Either enter an exact answer in terms of at or use 3.14 for and enter your answer as a decimal.
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In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.

What is the expression in factored form? -x^2 + 3x + 28 a. (x-7)(x-4) b. -(x-7)(x+4) c. (x+4)(x+7) d. -(x-4)(x+7)

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]