Which statement best compares the graphs of f(x)=[x] and f(x)=[x]

3382-299=3383- ? fill in the blank?

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

The ratio of the perimeters of two similar triangles is 4: 3. what are the areas of these triangles if the sum of their areas is 130cm2?