Chapter Seven VocabularyCC 1
Vocabulary Word
Definition Picture Learn more…
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
http://edtech2.boisestate.edu/
www.mathsisfun.com
More Information -
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
www.coolmath.com
http://passyworldofmathematics.com/
http://edtech2.boisestate.edu/jenniferzollinger/distribution.html
equation
http://edtech2.boisestate.edu/ http://www.algebrahelp.com/
More Information -
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
More Information on
Factors
inequalitytwo expressions with an inequality symbols in between
http://ikaes.com/
http://www.coolmath.com/
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 (-).
http://kellysunit.weebly.com/inverse-operations.html
http://www.amathsdictionaryforkids.com/
Multiplicative Inverse
another name for a reciprocal
http://mravery.edublogs.org/
http://www.printable-math-worksheets.com/
More Information on Multiplicative
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
http://thefirstgradefairytales.blogspot.com/
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