CAASPP Practice Participation Math 8

Select the correct value of n for the following equation:

5ⁿ = 5¹¹ ⋅ 5³

• n = 33

• n = 14

• n = 8

This graph shows a proportional relationship between the distance traveled by Tim on a road trip and the number of hours for which he traveled. Which statement identifies the correct slope and the correct interpretation of the slope for this situation?

Sally is solving the linear equation,

13 + 4x - 9 = 7x + 7 - 3x.

Her final two steps are:

4 + 4x = 4x + 7

4 = 7

Select the statement that correctly interprets Sally's solution.

• The solution is x = 0.

• The solution is the ordered pair (4, 7).

• There is no solution since 4 = 7 is a false statement.

• There are infinitely many solutions since 4 = 7 is a false statement.

Which table of values can be defined by the following function.

y = 4x - 2

• 
• 
• 
• 

David and Karen have a goal to read 10,000 pages together by the end of summer.

• - David reads 80 pages every day.

• - Karen reads 25% more pages every day than David reads.

David and Karen agree that the model 180d = 10,000 will tell them how many days it will take them to read 10,000 pages, together, by the end of summer.

They invite Rick to read with them to get to their goal faster. Rick reads 35% fewer pages per day than Karen.

Which equation can be used to find how many days it will take David, Karen, and Rick to read 10,000 pages, together, by the end of summer?

• 232d = 10,000

• 245d = 10,000

• 288d = 10,000

• 315d = 10,000

Marco says that the interior angles of a triangle add up to 180°. He claims that the interior angles of a hexagon must add up to 360° because a hexagon has twice as many vertices as a triangle and can be divided into two triangles. Therefore, its interior angles must sum to twice the value of those of a triangle.

Which statement, if any, explains Marco's error?

• A hexagon does not have 6 vertices.

• A hexagon can be divided into 4 triangles, not 2.

• The interior angles of a triangle do not add up to 180°.

• Marco's statement is correct and contains no error.

Jamal states that ax + b = a(x + c), given a, b, and care not equal to 0.

What must be the value of c for Jamal's statement to be true?

• a

• b

• ac

• b/a

Select ALL the equations that can be represented by a straight line when graphed on the coordinate plane.

A biologist tracks the number of bacteria living in a water tank. The biologist used a function that represents the amount of a certain chemical solution that is added to the water.

• - When the water has no chemicals, the number of bacteria (b) is 1200 per gallon

• - For each tablespoon of the chemical solution (c) added to each gallon of water, the number of bacteria decreases by 75 per gallon.

How much of the chemical, in tablespoons, must be added to a 500-gallon tank to reduce the bacteria count to a safe 300 bacteria per gallon?

• 4,000 tablespoons

• 16,000 tablespoons

• 12,000 tablespoons

• 6,000 tablespoons