1.solve the following system by substitution:

4x+y=24
y=-4x+24

2.solve the following system by substitution

y=2x+4
3x+y=9

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.

The fraction 7/9 is equivalent to a percent that is greater than 100%. truefalse

Elena is paid a constant rate for each hour she works. the table shows the amounts of money that elena earned for various amounts of time that she worked.