7th ch5. review

Front

What is the result of simplifying the expression (6x + 9) - (4x + 6)?

Back

The result is 2x + 3.

Front

Why can't you simplify the expression 3x + 7?

Back

You can't add them because they don't have like terms.

Front

If Seth sells candles for $14.35 each and sold 21 candles, how much did he earn?

Back

Seth earned $284.55.

Front

What is the difference when simplifying (2x + 6) – (7x + 3)?

Back

The difference is -5x + 3.

Front

What is the result of (7a + 4) - (9a + 2)?

Back

The result is -2a + 2.

Front

What are like terms in algebra?

Back

Like terms are terms that have the same variable raised to the same power.

Front

How do you combine like terms in an expression?

Back

You add or subtract the coefficients of the like terms.

Front

What is the formula to calculate total earnings from selling items?

Back

Total earnings = (Price per item) x (Number of items sold).

Front

What does it mean to simplify an expression?

Back

To simplify an expression means to reduce it to its simplest form by combining like terms and performing operations.

Front

What is the importance of parentheses in algebraic expressions?

Back

Parentheses indicate the order of operations and which terms should be grouped together.