Question

A triangle has side lengths of (1.2u + 1.8v) centimeters, (6.5u + 8.7w) centimeters, and (5.8W – 6.9v) centimeters. Which expression represents the perimeter, in centimeters, of the triangle? 0 13.5uw + 3.6vw 7.7u + 1.8w + 7.6v -1.lvw + 15.2uw + 3uv 0 14.5w – 5.1v + 7.7u Submit Answer i dont get this?

Answer 1

1) The Perimeter (2P) is the sum of the side lengths so let's sum those given measures:

2P=(1.2u+1.8v) +(6.5u+8.7w)+(5.8w-6.9v) Combining Like terms

2P=1.2u +6.5u +1.8v -6.9v +8.7w+5.8w

2P= 7.7u-5.1v+14.5w

2) Reordering

2p= 14.5w -5.1v +7.7u