Iused all of my points for this so me 1.solve -7u = -21 for u. u = 2.select all the expressions that are equivalent to 8w - 9 + 5 - 2w. 2(3w - 2) (6w + 3) + (2w - 7) 6w - 4 (11w - 1) - (5w + 3) 3w + 7 + 3w - 11 10w + 14 2(5w + 7) 3.a square pyramid is sliced by a plane. the plane is perpendicular to the base but does not go through the apex of the pyramid. what is the shape of the cross section? select all that apply. square triangle rectangle trapezoid 4.which of the following is equivalent to 16 kilograms? 0.016 grams 0.16 grams 1600 grams 16000 grams 5.how many triangles can be constructed using the following three side lengths: 4.8 cm, 2.1 cm, and 2.6 cm? no triangles one triangle an infinite number of triangles 6.solve g + (-11) = 19 for g. g = 7.a histogram is being made for the following set of data. if the length of each interval is going to be 7, how many bars will there be on the histogram? 78, 92, 98, 87, 86, 72, 92, 81, 86, 92 4 5 6 7