Find the slope containing the two points (2,-1) and (4,-4)

Which value is not a solution of 8x^3 – 1 = 0

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Someone me i need with this stuff