Is y=x+9 linear or is it not linear

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

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.

What are the equivalent ratios for 24/2= /3= /5.5=108/ = /15