Review of SolvingLinear Systems

Directions:• Answer all questions• Show all work (full credit will be only be

given to those that show all work)• Place name on paper (points will be

deducted for “no namers”)• Hand paper into Mrs. Krebsbach by the

beginning of tomorrow’s class• Late papers will be deducted

1. What is a linear system?

• Extra: What is another name for “a linear system”?

2. How many ways did you learn to solve a linear system?

• List the ways you learned.

3. Solve the system by graphing.y= -2x

y= 5x+3

4. Solve the system by using substitution.• Copy the problem onto your paper and

show all work

4x+3y = 31

y = 2x+7

5. Solve the system by using substitution.• Copy the problem onto your paper and

show all work

a+½b = 7

3a+2b= 18

6. Describe how you would solve a linear system by using linear combination. (full sentences are expected)

7. Solve the system by usinglinear combination

• Copy the problem and show all work.

x+7y = 12

-5y + 3x = 10

6.Solve this problem by using linear combination.

8. Solve the system by using the method of your choice.• Hint: you will get fractions

3x-5y = -4

7y = 8+9x

9. Compact Disc Sale

A store is selling cd’s for $10.50 and $8.50. You buy 10 discs and spend a total of $93. How many cd’s at each price did you buy?

a. Write a system of linear equations that describes the situation.

b. Solve the system you wrote in part a. Be sure to attach labels.

The End!• Be sure your name is on your paper and

hand it in by the beginning of class time tomorrow!

• Quiz is tomorrow on 7.1-7.3