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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.

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !