Unit Test 3A

Solve the system of equations BY GRAPHING.

x + y =4

2x - 5y = 15

You must provide a sketch of the system on your work paper for full credit.

• (0,4)

• (4,0)

• (0,-3)

• (7.5,0)

• (5,-1)

Solve the system of equations BY GRAPHING.

y = -2x + 3

8x + 4y = 12

You must provide a sketch of the system on your work paper for full credit

• (0,3)

• (1.5,0)

• NO SOLUTION

• INFINITELY MANY SOLUTIONS

Solve the system of equations BY SUBSITUTION.

6x + 2y = -26

x = 6y + 21

You must show your work with the proper method for full credit.

Solve the system of equations BY SUBSTITUTION

y = -5x -10

4x - 7y &= -8

You must show your work with the proper method for full credit.

Solve the system of equations BY ELIMINIATION

x + 2y = -14

x - y = 13

You must show your work with the proper method for full credit.

Solve the system of equations BY ELIMINATION.

2x - 3y = 23

x + 3y = -20

You must show your work with the proper method for full credit.

Solve the system of equations BY ELIMINATION.

2x - y = 11

6x - 3y = 15

You must show your work with the proper method for full credit.

Solve the system of equations BY ELIMINATION.

7x - 3y = 45

4x + 5y = 19

You must show your work with the proper method for full credit.

Emma bought 4 jars of jelly and 6 jars of peanut butter for $19.32. Judah bought 3 jars of jelly and 5 jars of peanut butter for $15.67. Write a system of linear equations.

• 4x + 5y = 19.32,

  3x + 6y = 15.67

• 4x + 5y = 15.67,

  3x + 6y = 19.32

• 4x + 6y = 15.67,

  3x + 5y = 19.32

• 4x + 6y = 19.32,

  3x + 5y = 15.67

Emma bought 4 jars of jelly (x) and 6 jars of peanut butter (y) for $19.32. Judah bought 3 jars of jelly and 5 jars of peanut butter for $15.67. Find the cost of a jar of peanut butter.

• $1.29

• $2.36

• (1.29,2.36)

• (2.36,1.29)