Question

1). A jar contains 0.25 liter of apple juice and 0.30 liter of grape juice. Melissa poured 0.75 liter of pineapple juice into the jar. She then drank 0.20 liter of the mixture.

Part A: Write an expression to represent the total amount of juice left in the jar.

Part B: Simplify the expression and identify which property is used in each step.

2). The elevation of city A is 72 feet above sea level; the elevation of city C is 24 feet above sea level. The elevation of city D is 1 over 4 of the elevation of city C.

Part A: Write an expression to represent the elevation, in feet, of city D.

Part B: Simplify the expression and explain why the answer is negative or positive.

3). The temperature of a city changed by a total of −12 degrees Celsius over a 2-week period. The temperature changed by the same amount each week.

Part A: Write an expression to show the average change in the temperature of the city each week.

Part B: Simplify the expression and explain, using words, what your answer means.