Ch 3 Test REVIEW-Expressions (6th Grade)

Front

What is an expression in mathematics?

Back

An expression is a combination of numbers, variables, and operators (such as +, -, *, /) that represents a value.

Front

What does the variable 'x' typically represent in an expression?

Back

The variable 'x' often represents an unknown value that can change or vary.

Front

How do you simplify the expression 8(7x + 3)?

Back

To simplify, distribute 8: 8 * 7x + 8 * 3 = 56x + 24.

Front

What is the first step in solving the expression 4(2 + 9x - 1)?

Back

First, simplify inside the parentheses: 2 + 9x - 1 = 1 + 9x.

Front

What is the simplified form of 4(1 + 9x)?

Back

Distributing gives 4 * 1 + 4 * 9x = 4 + 36x.

Front

If you have the expression 4x + 2y, what do 'x' and 'y' represent?

Back

In this expression, 'x' represents the number of sandwiches and 'y' represents the number of bags of chips.

Front

How do you evaluate the expression 4x + 2y for x = 6 and y = 10?

Back

Substitute the values: 4(6) + 2(10) = 24 + 20 = 44.

Front

What is the total number of songs added if you add 20 songs the first week, 35 songs the second week, and y songs the third week?

Back

The expression is 20 + 35 + y, which simplifies to 55 + y.

Front

What does it mean to 'simplify' an expression?

Back

To simplify an expression means to combine like terms and reduce it to its simplest form.

Front

What is a 'like term' in algebra?

Back

Like terms are terms that have the same variable raised to the same power, allowing them to be combined.