Ineed this number in a mixed number

The deck that kenneth is building is in the shape of a parallelogram abcd the measure of angle c is one third the measure of angle b find the measure of each angle of the deck

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?