System of Equations Test

Solve the following systems of equations using substitution:

x = 6

y = 2x - 3

• (6, 6)

• (6, 9)

• (9, 6)

• (9, 9)

Solve by substitution.

3x + 4y =18

y=3

• (3, 2)

• (2,-3)

• (2,3)

• none of these

How many solutions?

• One solution

• No solutions

• Infinitely many solutions

Is (6,3) a solution to this graph?

• Yes

• No

• Maybe

There are 15 animals in a barn.  These animals are horses and chickens.  There are 44 legs in all.  Which system of equations represents the situation?

• x + y = 15
  4x + 2y = 44

• 4x + 2y = 15
  x + y = 44

• x = 2y + 44
  4x = y + 15

• 2x - 4y = 44
  x - y = 15

Solve by using elimination method.

y + 3x = 10

-y + 2x = 5

What is the solution to this system of equations? Solve by substitution or graphing.

Solve  the system of equations.  
   x + 5y = -27
-2x - 5y = 24

Solve by elimination
-2x + 6y = 16
-4x - 3y = 2

Amy sold 10 packages of sugar cookies and 2 packages of oatmeal cookies for $56. Adam sold 9 packages of sugar cookies and 3 packages of oatmeal cookies for $60. What is the price of 1 pack of sugar cookies and 1 pack of oatmeal cookies?