F(x) = - x2 + 2x; {–1, 2, 3}
a. r = {-3, 0, -3}
b. r = {1, 8, 3}
c. r = {2, 8, -3}
d. r = {-3, 0, 3}

A is the correct answer just put the values from the domain and see for yourself

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's

Tha answers are c. 2 and d. 7.5 ; )