Chapter Seven VocabularyCC 1

Vocabulary Word

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boundary point the answer or solution to an

inequality

3x + 2 > 17 -2 -2 5x > 15 5 5 x > 3

The solution (3) is the boundary point.

http://freemathresource.com/

coefficientthe number in front of a variable

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Parts of an Equation

constant term

the number in an expression that does not have a variable with it

http://www.ck12.org/

Distributive Property

multiply the number outside of the parenthesis with everything inside the parentheses

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http://passyworldofmathematics.com/

http://edtech2.boisestate.edu/jenniferzollinger/distribution.html

equation

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Parts of an Equation

evaluate to put in numbers for the variables (letters) in an algebraic expression

Evaluating an algebraic expression:

6b + 5 where b = 2

6b + 5 ↓

(6 * 2) + 5 ↓

12 + 5 ↘ ↙ 17

expression math phrase that combines numbers by using +, -, *, or ÷

An expression does not have an equal sign (=).

-5 + 11

7 * 3

10 – 2 + 5 +3

factor numbers that can be multiplied together to get another number

24 ÷ 4 = 6

24 ÷ 6 = 4

6 and 4 are both factors of 24 1 * 24 = 242 * 12 = 243 * 8 = 244 * 6 = 24

1, 2, 3, 4, 6, 8, 12, & 24 are all factors of 24

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Factors

inequalitytwo expressions with an inequality symbols in between

http://ikaes.com/

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http://www.slideshare.net/troxellm/inequalities-ppt-revised

inverse operation an operation (+, -, *, ÷) that

“undoes” (is the opposite) another operation

Addition (+) is the inverse operation of subtraction (-).

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http://www.amathsdictionaryforkids.com/

Multiplicative Inverse

another name for a reciprocal

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Inverse

quotient the answer of a division problem 14 ÷ 7= 2

↗ quotient

ratio a comparison of two groups

3 Ways to Write Ratiosto 5 girls to 15 boys

: 5 girls : 15 boys

fraction 5 girls 15 boys

ratea type of ratio where there are two different units

Example Rates

miles per gallon

dollars ($) per pound

meters per second

reciprocal To find the reciprocal of whole number : Write the number as a fraction over one and then flip it.

reciprocal

↓

🔃 13 1 1 13

http://mravery.edublogs.org/

To find the reciprocal of a fraction : Flip the fraction.

🔃 7 9 9 7 ↑ reciprocal

rule the math that needs to be done to get from the input to the output

Sample Rules:1. Add 52. Divide by 3, then add 23. Multiply by 7, then subtract 1

Input Output

5 13

6 15

9 21

10 23

The rule here is to multiply by 2 and add 3.

simplify to change an expression to be easier to understand

*no parentheses 2x(5+3)*no like terms (combine them instead)

5a + 2a

5x - 3x +7↘↙

simplified: 2x +7

solveto find the answer or solution

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term a number, a variable, or a number multiplied by variable/variables

Number = 23Variable = b

Number and Variable(s) = 12y or 5ab

unit rate a rate with a denominator of 1

$8.001 hour of babysitting

$0.751 apple

4 game tokens$1.00

gcps.desire2learn.com

variable a letter that represents an unknown value 2x + 8 – 9y

↘ ↙ variables