Whats the probability of being dealt a flush when playing five-card draw poker

Choose the correct classification of 3x4 − 9x3 − 3x2 + 6. 5th degree polynomial 4th degree polynomial 9th degree polynomial 24th degree polynomial

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

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'