Round 0.173 to the nearest hundredth

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

What can you determine about the solutions of this system