(x − 4)(x +_ )(x −_ )

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The length of a rectangle plus its width is 25 cm. the area is 156 square cm. what are the length and width of the rectangle? separate the answers with a comma.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

After t seconds, a ball tossed in the air from the ground level reaches a height of h feet given by the equation h = 144t-16t^2. after how many seconds will the ball hit the ground before rebounding?