Gail and her three friends all share half a pie. gail a and her friends each eat an equal sized piece. they believe each piece has and angle to 25 degrees. are their calculations correct?

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great