Expressions
Write an expression for "the sum of twice x and 3"
2x + 3
The distance from zero on a number line
absolute value
The number that is NOT an integer:
4 -5 2.3 0
2.3
These six letters tell us the order of operations for solving equations
PEMDAS (or Please Excuse My Dear Aunt Sally)
4
Evaluate 3 (x - 5) for x = 3
-6
A letter that stands for an unknown number
variable
Simplify 3 (-4)
-12
The order of operations in the correct order
Exponents Addition and Subtraction
Parentheses Multiplication and Division
Parentheses
Exponents
Multiplication and Division
Addition and Subtraction
The number of quadrants on a coordinate plane
4
Evaluate x + y for x = 27 y = -32
-5
the name for the whole positive or negative numbers and zero
integers
When two negative numbers are multiplied or divided, the answer will be
positive or negative
positive
Simplify (3 x 8 + 6) x 9
270
The ordered pair (4, -1) would be graphed in this quadrant.
IV
the quotient of 3 and a
3/a
An example of a numeric expression
any mathematical expression that is all numbers and no variable
If a negative number is multiplied by a positive number, the sign of the answer is
negative
What you would solve first in this expression:
-3 [(2+5) - 9] + 6
2+5
The ordered pair (0,6) is found on this axis
Y axis
30 less than 3 times a number b
3b - 30
If you are finding the quotient, you are doing this operation.
division
(6)(8)(-5)
-240
What you would simplify last in this expression:
[(2 + 3)+(-2)](6) + 2
+2
Graphing on a coordinate plane starts at this point, also called the origin.
(0,0)