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6-8 Accelerated 7 Unit 4

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IM K-5 Math
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Unit 4

Glossary

Accelerated 7

A coefficient is a number that is multiplied by a variable.

In the expression \(3x+5\), the coefficient of \(x\) is 3.
In the expression \(y+5\), the coefficient of \(y\) is 1, because \(y=1 \boldcdot y\).

From an earlier course.

In an expression like \(5x+2\), the number 2 is called the constant term. It doesn’t change when the variable \(x\) changes.

In the expression \(7x+9\), the constant term is 9.
In the expression \(5x+(\text-8)\), the constant term is -8.
In the expression \(12-4x\), the constant term is 12.

used in:

To expand an expression, use the distributive property to rewrite a product as a sum. The new expression is equivalent to the original expression.

For example, the expression \(5(4x+7)\) can be expanded to get the equivalent expression \(20x + 35\).

used in:

To factor an expression, use the distributive property to rewrite a sum as a product. The new expression is equivalent to the original expression.

For example, the expression \(20x + 35\) can be factored to get the equivalent expression \(5(4x+7)\).

used in:

Terms are the parts of an expression that are added together. They can be a single number, a variable, or a number and a variable that are multiplied together.

7, \(y\), and \(9a\) are examples of terms.
The expression \(5x+3-18\) has 3 terms: \(5x\), 3, and -18.

used in: