What is the midpoint of AC given A(7,-5) and C (9,-1)

Which of the fallowing best completes the sequence 5,10,15, a) 30 b) 22 c)25 d)35

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.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much