17. You are supposed to use the perimeter formula for a rectangle. Your text has apparently written that formula as .. P = 2w +2l You are given values for P and l. Put them in the formula. .. 6 = 2w +2*1 Solve in the usual way. First, subtract 2. .. 4 = 2w Then, divide by 2 .. 2 = w You have found w, and it is 2.
_____ Personally, I like to write the perimeter formula for a rectangle as .. P = 2(w +l) Usng this version, we can fill in values and get .. 6 = 2(w +1) Dividing by 2 gives .. 3 = w +1 Subtracting 1, we get .. 2 = w
