Exam 4: Systems of Linear Equations

Mr. Wilson invested money in two accounts. His total investment was If one account pays in interest and the other pays in interest, how much does he have in each account if he earned a total of in interest in 1 year?

Solve the system by solving one of the equations for x or y and then use the substitution method.

A woman invested times as much at as she did at The total amount of interest she earns in 1 year from both accounts is How much did she invest at each rate?

Solve the system of linear equations by the elimination method.

Solve the system of linear equations by the elimination method.

Solve the system of linear equations by elimination.

Solve the system of linear equations by graphing.

Solve the system of linear equations by graphing.

Solve the system of linear equations by elimination.

Solve the system by substitution. Substitute the expression in the second equation into the first equation and solve. If the lines coincide, answer dependent . If the lines are parallel, answer no solution .

Solve the system by eliminating the x variable.

Solve the system of linear equations by the elimination method.

The difference of two positive numbers is The larger is twice the smaller decreased by Find the two numbers.

Solve the system by eliminating the y variable.

Solve the system of linear equations by the elimination method.

Solve the system of linear equations by graphing.

Solve the system of linear equations by graphing.

Solve the system by solving one of the equations for x or y and then use the substitution method.

Solve the system of linear equations by elimination.

How much 52% antifreeze solution and 32% antifreeze solution should be combined to give 40 gallons of 37% antifreeze solution?