Which of the following expressions has a value of 3? Select all that apply. 0-6 = -2
04-(-1)
(-1)(-3)
(-2) - 1
O 15 - 5
O4+1

What is the measure of x? 43° 86° 172° 344°

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?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ac=26 and ch=8, find bh.