PRACTICE QUIZ for Quiz #5 - 2nd Qtr - ALG

What is the solution to this system of equations?

x - 4y = 16

5x + 4y = 8

Write your answer as an ordered pair.

Use parentheses and a comma.

Do NOT use spaces.

Solve:

y = 3x + 9

2y + 3x = -18

• (5, 0)

• (9, 18)

• (-4 -3)

• (1, 16)

Solve the system of equations.

x = -6y

2x + 12y = 0

• (-6, 1)

• (0, 0)

• (1, -6)

• No solution

• Infinite solutions

If a system of equations has no solution, what does the graph look like?

• intersecting lines

• parallel lines

• curved lines

• both lines are exactly the same

On Wednesday, Kamryn was able to do 3 ladies haircuts and 2 mens hair cuts in 315 minutes. On Thursday, she was able to do 2 ladies haircuts and 4 mens hair cuts in 450 minutes. Which system of equations represents the situation?

• 3x + 2y = 315

  2x + 4y = 450

• 3x + 2y = 450

  2x + 4y = 315

• 2x + 2y = 315

  3x + 4y = 450

Stephen bought 10 cups of coffee and 5 doughnuts for his office at the cost of $16.50. At the same coffee shop, Karessa bought 5 cups of coffee and 10 doughnuts for a total of $14.25. Which equations could be used to determine the cost of each cup of coffee, and each doughnut??

• 10x + 5y = 14.25

  5x + 10y = 16.50

• 10x + 5y = 16.50

  5x + 10y = 14.25

• x + y = 10

  5x + 10y = 16.50

• x + y = 5

  5x + 10y = 16.50

Azel sold 10 packages of sugar cookies and 2 packages of oatmeal cookies for $56. Brooke 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?

• Sugar Cookies $5

  Oatmeal Cookies $3

• Sugar Cookies $4

  Oatmeal Cookies $8

• Sugar Cookies $2

  Oatmeal Cookies $6

• Sugar Cookies $3

  Oatmeal Cookies $6

Select all of the ordered pairs that are solutions to this inequality.

5x -2y < 14

• (3, -3)

• (-3, 3)

• (3, 4)

• (4, 3)

Select all of the ordered pairs that are solutions for the inequality

 $x-6y\ge2$  

• (-4, -1)

• (-1, -4)

• (0, 0)

• (3, -2)

Select all of the ordered pairs that are NOT solutions to the inequality 2x - 4y < 18.

• (9, 0)

• (7, -1)

• (-6, -2)

• (4, -3)