Variables and Expressions Algebra

Simplify this expression:

-7w + (-6) + 5 + (-9w)

• -2w - 1

• -16w - 11

• -16w - 1

• -2w + 11

Use distributive property to expand this expression: 2w( - 4.5 - 2.7x)

• -9w - 2.7x

• 2w - 4.5 - 2.7x

• -9w - 5.4x

• -9w - 5.4wx

A _________ is an unknown quantity that it represented

by symbols, shapes, and letters.

• variable

• expression

• equation

• constant

In algebra, a ___________ is a known quantity that doesn't change. It's usually written as a _____________.

• variable, constant

• variable, letter

• constant, variable

• constant, number

Is the mathematical statement shown an equation or an expression?

• equation

• expression

How many variables in this statement? How many constants?

• 2 variables and 6 constants

• 3 variables and 4 constants

• 4 variables and 3 constants

• 2 variables and 2 constants

Tell whether each statement below is an equation or expression.

• A and C are equations but B is an expression.

• A and B are expressions but C is an equation.

• B and C are expressions but A is an equation.

The expression shown shows what operation?

• addition

• subtraction

• multiplication

• division

The equation given shows what operation?

2c = 9

• addition

• subtraction

• multiplication

• division