# How can you write an expression using variables B and C to find the perimeter of the quad. The quadrangle has the following lengths: B, C, B-2, C-B. Step 2 if B=11 and C=16 what is the perimeter?

The perimeter is simply the sum of the lengths of the sides, so B+C+B−2+C−B. We can collect like terms to get $B + 2 C - 2$. Substituting in $B = 11$ and $C = 16$ gives $11 + 32 - 2 = 41$ units.