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ACT Prep Math

even numbers divide evenly by 2
odd numbers can not be divided by 2, remainder
digits 1, ,2, 3, 4, 5, 6, 7, 8, 9, 10 are used to make other numbers
prime numbers cab be divided by 1 and itself
absolute value always even
variables the letters next to the numbers 2x
coefficients the numbers next to the letters 2x
divisibility rules any even number can be divided by 2 any number divisible by 3 if sum of its digits can be evenly divided by 3 any number is divisible by 5 its last digits are 0 or 5 any number is divisible by 6 if i it can be divided by its factors
divisibility rules 2 any number divisible by 8 if the last 3 digits is also divisible by 8 any number is divisible by 9 if the sum of its digits is divisible by 9
equal sign =
NOT equal sign
greater than, strict inequality >
less than, strict inequality
greater than inequality
less than inequality
parentheses ( )
brackets [ ]
plus sign +
minus sign -
plus minus sign plus sign over the minus sign
asterick *
time sign x
multiplication dot
division sign ÷
division slash /
which questions should you answer first? the easiest
how many questions do you need to answer in 60 minutes 60
if you are trying to get a 24 on the ACT math, how many do you have to answer correct 39-40
what kind of math is on the test? pre algebra, elementary algebra, intermediate algebra, coordinate geometry, plane geometry, and trigonometry
if you do not know the answer to a question what should you do? guess
angle formed by 2 lines or line segments which intersect a one point
vertex the point of intersections
what are angles measured in? degree or radian
acute angle measurement 0-90 degrees
right angle an angle whose measurement in degrees are exactly 90
obtuse angle an angle whose degree measure is between 90-180
straight angle an angle whose degree measure is exactly 180
perpendicular lines are formed when the angle between two lines is 90 degrees
supplementary 2 angles= 180 degrees
complementary 2 angles= 90 degrees
bisect angle means to cut it in half
integers -3, -2, -1, 0, 1, 2, 3
rationals fractions, that is, anything expressible as ration of integers
real numbers integers, rationals, radicals
order of operations PEMDAS. parentheses, exponents, multiplication, divide, add, subtract
mean average
median middle number
mode number that occurs most
probability # of desired outcomes over # of total outcomes
area 1/2bh
circle area πr squared
circle circumference 2πr
full circle = how many degrees 360º
Created by: mmomon12