last week drew worked 7.9 hours. this week he worked 8.6 hours. how many more hours did he work this week than last week?

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

D(5, 7). e(4,3), and f(8, 2) form the vertices of a triangle. what is mzdef? oa. 30° ob. 45° oc. 60° od 90°

X+y=-4 x-y=2 use elimination with adding and subtraction