# Mr. Jones 08 Semester Test Review

## Terms

undefined, object
copy deck
variable
a symbol, usually a letter, used to represent a #
estimate 18% of 40
18% ->20 -> 1/5; 1/5 of 40 is about 8
"of" followed by a # or a representation of a #, means what?
TO MULTIPLY
y-intercept; y =3x - 2
y-coordinate of a point where the line crosses the y-axis; (0, -2)
no slope
line is vertical
what property is 6 + (2 + 3) = (6 + 2) + 3?
inverse operation
operations that "undo" each other
what property is 13 x 1 = 13?
identity property of multiplication
estimate 21 out of 25
21->20-> 20/25 = 4/5 ->80%; 80%
√47 round to the nearest whole
7
range
values of Y
20% to a fraction
1/5
what property is 6 + 1 = 1 + 6?
negative number
a number less than 0
y = 3x - 2, what's the slope?
the coefficient of x is the slope; 3
what property is 2(6 + 3) = 2(6) + 2(3)?
distributive property
absolute value
the distance between a # and 0 on the number line
numerical expression
a mathematical expression that has a combination of numbers and at least 1 operation
algebraic expression
a combination of variables, numbers and at least 1 operation
zero slope
line is horizontal
1,230,000 in scientific notation
1.23 x 10 to the 6th power
multiplicative inverse
a fraction and its "flip" 1/3 = 3/1
less
whatever follows "less" comes 2nd in the subtraction problem
12 + 3x = 4x
x =12
the sum of a negative number and a positive number is __ 0
sometimes
domain
values of X
the sum of a negative # and 0 is __ a negative #
always
order of operations
1. parentheses 2. exponents 3. multiplication 4. division (which ever comes first , 3 or 4) 5. addition 6. subtraction (which ever comes first, 5 or 6)
5x, what's the coefficient?
5
expresssion
doesn't have an =
an integer and its opposite
\$2 for 4 hours
.50ç/hr
if a whole number greater than 1 is multiplied by a fraction less than 0, what is the product?
a negative number less than the fraction
-6/9 __ -1/2
<
y = 3x - 2, what's the y-intercept?
the term without a variable; -2
open sentence
an equation WITH a variable
four more than twice a number is 8
4 + 2x = 8
dependent variable
Y
slope formula
m = Y2 - Y divided by X2 - X
positive slope
line is rising from left to right
equation
has an =
term
separated by and addition or subtraction sign
3% to a decimal
0.03
\$3 skateboard, 25% off. what's the sale price?
\$2.25
the sum of a positive number and a negative number is ___ a negative number
sometimes
y/? = rise/?
Y/X= rise/run
evaluate
to solve an expression by replacing the variables
negative slope
line is falling from left to right
less than
whatever follows "less than" comes 1st in the subraction problem
0.941 to a %
94.1%
if you know the y-intercept, then x is ...
zero
94 out of 100 into a %
94%
independent variable
X
3 to 6
1 to 2; 1/2; 1:2

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