8th grade Math Review 7

Front

What is a scale factor in transformations?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a shape. If the scale factor is greater than 1, it is an enlargement; if it is less than 1, it is a reduction.

Front

How do you combine like terms in an expression?

Back

To combine like terms, add or subtract the coefficients of terms that have the same variable raised to the same power.

Front

Back

Subtract 2 from both sides to isolate the term with x.

Front

What does it mean for a transformation to be rigid?

Back

A rigid transformation is a transformation that preserves the shape and size of a figure, such as translations, rotations, and reflections.

Front

Back

First, subtract 30 from both sides to isolate the term with x.

Front

What is the definition of a variable in algebra?

Back

A variable is a symbol, often a letter, that represents one or more numbers.

Front

What is the difference between an expression and an equation?

Back

An expression is a combination of numbers, variables, and operations without an equality sign, while an equation states that two expressions are equal.

Front

How do you identify corresponding sides in similar figures?

Back

Corresponding sides in similar figures are the sides that are in the same relative position in each figure.

Front

Back

Front

What is the purpose of using parentheses in algebraic expressions?

Back

Parentheses indicate which operations should be performed first in an expression.