Solve the system of equations using substitution 4x+y=23 y=x+8

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.

Which of the following are accepted without proof in a logical system? check all that apply.

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8