Questions from College Mathematics

Q: Solve Problem using substitution or elimination by addition. /

Solve Problem using substitution or elimination by addition.

Q: Note that each solution can be found mentally, without the use

Note that each solution can be found mentally, without the use of a calculator or pencil-andpaper calculation; try to visualize the graphs of both lines.

Q: Note that each solution can be found mentally, without the use

Note that each solution can be found mentally, without the use of a calculator or pencil-andpaper calculation; try to visualize the graphs of both lines.

Q: Three departments have 12, 15, and 18 members, respectively

Three departments have 12, 15, and 18 members, respectively. If each department selects a delegate and an alternate to represent the department at a conference, how many ways can this be done?

Q: Note that each solution can be found mentally, without the use

Note that each solution can be found mentally, without the use of a calculator or pencil-andpaper calculation; try to visualize the graphs of both lines.

Q: Note that each solution can be found mentally, without the use

Note that each solution can be found mentally, without the use of a calculator or pencil-andpaper calculation; try to visualize the graphs of both lines.

Q: In a free competitive market, if the demand for a good

In a free competitive market, if the demand for a good is greater than the supply, will the price tend to go up or come down?

Q: Problems are concerned with the linear system. If the system

Problems are concerned with the linear system. If the system has no solution, discuss the relationships among the four constants.

Q: Problems are concerned with the linear system. If m =

Problems are concerned with the linear system. If m = 0, how many solutions does the system have?

Q: Use a graphing calculator to find the solution to each system.

Use a graphing calculator to find the solution to each system. Round any approximate solutions to three decimal places.