What fraction is equivalent to 4/8 and has a numerator that is five less than three times the numerator

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.

Atheater wants to build movable steps that they can use to go on and off the stage. they want the steps to have enough space inside so they can also be used to store props. how much space is inside the steps?