13.5 Review-Final

Front

What is the expression for three times the sum of a number and 2?

Back

3(e + 2)

Front

How do you calculate the percent of change when a price increases from $100 to $120?

Back

Percent of change = ((New Price - Old Price) / Old Price) * 100 = ((120 - 100) / 100) * 100 = 20%.

Front

Simplify the expression: 5a + 2b - 3a + 4

Back

2a + 2b + 4

Front

What error did Sarah make in her distribution?

Back

She didn't distribute correctly. The second step should read -3x + 12 = 24.

Front

What is the percent of change if the price of The Polar Express movie decreases from $13 to $9?

Back

Percent of change = ((Old Price - New Price) / Old Price) * 100 = ((13 - 9) / 13) * 100 = 31%.

Front

Define 'percent of change'.

Back

Percent of change is a measure of how much a quantity has increased or decreased relative to its original value, expressed as a percentage.

Front

What is the formula for finding the percent of change?

Back

Percent of change = ((New Value - Old Value) / Old Value) * 100.

Front

What does 'combining like terms' mean in algebra?

Back

Combining like terms means to simplify an expression by adding or subtracting terms that have the same variable raised to the same power.

Front

What is the result of simplifying the expression: 4x + 3x - 2x?

Back

5x.

Front

What is the distributive property in mathematics?

Back

The distributive property states that a(b + c) = ab + ac.