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Definition of Real Number. ✔Correct Answer--Any number that appears on the number line
Types of a Real Numbers. ✔Correct Answer--Includes fractions, decimals, whole numbers, and zero
Definition of a Non-Real Number. ✔Correct Answer--Is a number that can't exist in real math and
therefore isn't on the number line.
Non-Real Number Types that may appear on the ACT. ✔Correct Answer--any number divided by
zero AND the square root of a negative number (imaginary number/i)
Definition of a Rational Number. ✔Correct Answer--Is any number or fraction that can be
expressed as a termination or repeating decimal.
Definition of a Non-Rational Number (Irrational Number) ✔Correct Answer--Is a real number that
cannot be written as a fraction or a terminating or repeating decimal.
Number Line ✔Correct Answer--Represents the spectrum of all real numbers and symbolically
extends infinitely in both directions.
Definition of Absolute Value ✔Correct Answer--Represents an expression's distance from zero on
the number line.
Rule of Absolute Value ✔Correct Answer--Absolute value is always positive, because a distance is
always positive.
Definition of an Integer ✔Correct Answer--any number, positive, negative, or zero, that can be
written without a fractional or decimal component.
Definition of a Whole Number ✔Correct Answer--any positive integer and doesn't include zero.
Definition of a Multiple ✔Correct Answer--Is a whole number that results from the product of two
other whole numbers.
Definition of a Factor ✔Correct Answer--Is a whole number that results from dividing two other
whole numbers.
Definition of a Prime Number ✔Correct Answer--Is a whole number that has exactly two factors: 1
and Itself.
Definition of a Composite Number ✔Correct Answer--Is a whole number that isn't prime; that is, it
has more than two factors.
Definition of Prime Factorization. ✔Correct Answer--Is the factoring of a composite number to its
primes, including duplicates.
, Definition of a Decimal ✔Correct Answer--Represents a fraction where the denominator is a
multiple of 10.
Definition of a Percent. ✔Correct Answer--Represents the first two decimal places of a decimal, or
a fraction over 100.
How To Find Percent of Change? ✔Correct Answer--Place the quantity of change over the starting
quantity, and convert this fraction with a denominator of 100.
((V2 - V1) / V1) × 100
how To Find Percent of a Group? ✔Correct Answer--place the number of the subgroup over the
entire group and convert the fraction.
Definition of a Fraction. ✔Correct Answer--Is a numerical quantity that is not a whole number.
What is the reciprocal of a fraction? ✔Correct Answer--Is the switching of its numerator and
denominator.
(Top becomes Bottom, Bottom becomes Top)
Definition of a Ratio. ✔Correct Answer--Compares the quantities of two groups as a reduced
fraction.
Definition of an Exponent. ✔Correct Answer--Refers to a base number multiplied by itself a certain
number of times.
Definition of an Imaginary Number. ✔Correct Answer--is represented by i, where i = √-1 or i² = -1.
Something to remember for Imaginary Numbers ✔Correct Answer--Because a square root can only
be of a positive number, the square root of a negative number isn't possible and is therefore an
imaginary number.
Definition of a Complex Number ✔Correct Answer--includes he imaginary number i in the form of
a+bi, such as 3+2i.
Distance Formula ✔Correct Answer--
midpoint formula ✔Correct Answer--
How to find the Conjugate of a Complex Number? ✔Correct Answer--Reverse the sign of the
imaginary component.
What is a Vector? ✔Correct Answer--An object represented by an arrow with magnitude and
direction.
How is a Vector written in component form? ✔Correct Answer--<a,b> where 'a' represents units
moved right and 'b' represents units moved up.
Definition of a Matrix. ✔Correct Answer--Is a rectangular array of letters or numbers that
represents data.