Solve the equation.
n+ 17.22 = 21
0 -3.78
O 3.78
0-38.22
O 38.22

Which expression is equivalent to −16y+13 ? −16(−y+13) 16(−y+2) −16(y+2) 16(−y+13)

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1