1. choose the correct simplification of the expression −5x2(4x − 6x2 − 3). 30x4 − 20x3 + 15x2 −11x4 − x3 − 8x2 −30x4 + 20x3 − 15x2 30x4 + 20x3 + 15x2 2. simplify (6x2 − 3 + 5x3) − (4x3 − 2x2 − 16). 2x3 − x2 + 21 −2x3 + x2 − 21 x3 + 8x2 + 13 −x3 − 8x2 + 13

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)