F(t)=-2t+5 evaluate f(-7) = ?

Which ratio is equivalent to 10: 85

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out