What does it mean to rewrite each sum as a product of the gcf of the addends and another number?

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

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²

Ellen makes and sells bookmarks. she graphs the number of bookmarks sold compared to the total money earned. why is the rate of change for the function graphed to the left?