Help me please? An explanation too? Cause I’m really slow at learning and my teachers just go without me on stuff :/

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

Describe the domain and range of y=2(3)^x-2+5

Apyramid fits exactly inside a cube. the cube and the pyramid share the same square base, and they are both exactly the same height. the volume of the cube is 66 cubic inches. what is the volume of the pyramid? explain your answer. answer asap