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- 1. Multiple Choice
Jacob bought a total of 9 pizzas for his class party. The amount of large pizzas was twice the amount of medium pizzas. How many large and how many medium pizzas did he buy?
What do the two variables in this problem stand for? Select two choices below.
x = number of large pizzas
y = number of medium pizzas
x = numbers of students in Jacob's class
y = how hungry the students are
y = number of slices each student gets
- 2. Multiple Choice
Jacob bought a total of 9 pizzas for his class party. The amount of large pizzas was twice the amount of medium pizzas. How many large and how many medium pizzas did he buy?
x = number of large pizzas
y = number of medium pizzas
Which of the two equations below represent this situation. Select two answers.
x + y = 9
x = 2y
y = 2x
xy = 9
- 3. Multiple Choice
Given our two equations:
x + y = 9
x = 2y
Which variable is already isolated?
In equation 2, the x is isolated.
In equation 1, the x is isolated.
In equation 2, the y is isolated.
In equation 1, the y is isolated.
- 4. Multiple Choice
Given that x = 2y, substitute it into the other equation. What equation do you have now?
(2y) + y = 9
x + (2x) = 9
x + (2y) = 9
2y = 2y
- 5. Multiple Choice
Use that equation to solve for y:
(2y) + y = 9
y = 3
y = 4.5
y = 27
y = 6
- 6. Multiple Choice
Given that y = 3, use that information with one of the two equations to solve for x.
y + x = 9
x = 2y
x = 6
x = 1.5
x = 3
x = 12
- 7. Multiple Choice
Remember:
x = the number of large pizzas
y = the number of medium pizzas
x = 6, y = 3
In the context of the problem, what is true? Select the two true statements below.
Jacob bought 6 large pizzas.
Jacob bought 3 medium pizzas.
Jacob bought 6 medium pizzas.
Jacob bought 3 large pizzas.
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