If you could please help that could be great TYSM

You paint a 1/2 of a wall in 1/4 hour. how long will it take you to paint one wall

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

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