At the market, avocados cost $1 each and pineapples cost $2 each. Find the cost of:

1. ​6 avocados and 3 pineapples
2. 4 avocados and 4 pineapples
3. 5 avocados and 4 pineapples
4. 8 avocados and 2 pineapples

At the market, avocados cost $1 each and pineapples cost $2 each.

1. Noah has $10 to spend at the produce market. Can he buy 7 avocados and 2 pineapples? Explain or show your reasoning.
2. What combinations of avocados and pineapples can Noah buy if he spends all of his $10?
3. Write an equation that represents $10 combinations of avocados and pineapples, using for the number of avocados and for the number of pineapples.
4. What are 3 combinations of avocados and pineapples that make your equation true? What are three combinations of avocados and pineapples that make it false?

There are two numbers. When the first number is doubled and added to the second number, the sum is 10.

1. Let represent the first number and let represent the second number. Write an equation showing the relationship between , , and 10.
2. Draw and label a coordinate plane.
3. Find 5 pairs of - and -values that make the statement and your equation true. Plot each pair of values as a point on the coordinate plane. What do you notice?
4. List 10 pairs of - and -values that do not make the statement and equation true. Using a different color, plot each pair of values as a point on the coordinate plane. What do you notice about these points compared to your first set of points?