Last year 80 students signed up for a summer trip to washington, dc. this summer 50 students have signed up to go. what is the percent decrease in the number of students?

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?

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

Plz. yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?