Please help and don't do it only because of point do it for help

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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.