Search
Create
Log in
Sign up
Log in
Sign up
EOG Math Review 7th grade
STUDY
Flashcards
Learn
Write
Spell
Test
PLAY
Match
Gravity
Terms in this set (44)
Rate
A ratio that compares two quantities having different units. (ex: 95 miles in 2 hours)
Unit Rate
Comparing an amount to one (5 apples for $10, how much does one apple cost?), a rate that has a denominator of 1
Percent of Increase
the percent of change when the new amount is greater than the original, percent by which an amount has been raised compared to the original amount, use when a word problem has: increase, markup, tax, tip.
Percent of Decrease
percent of change where the new number is less than the original number, use when a word problem has: decrease, discount, on sale, off, reduce.
Mark Up
amount added to the cost of a product to set the selling price.
Discount
the amount by which the regular price of an item is reduced.
Proportion
An equation that shows that two ratios are equal, the correct or appropriate relationship between the size, shape and position of the different parts of something.
Congruent
Having the same size and shape
Having same angle measure
Mean
Add up all the numbers and divide by total numbers you have
Median
middle number of a set of numbers (numbers in order from least to greatest)
Mode
number that occurs most often
Range
difference between highest and lowest numbers
Two step equations
Do the opposite to reverse the operation and work backwards with order of operations to get (x) by itself and what you do to one side you have to do to the other
Distributive Property
the product of a number and the sum of two numbers is the same as the sum of two products of the number multiplied by each of the other numbers.
Golden rule of Inequalities
when using inequalities, if you multiply or divide by a negative number, then the inequality must FLIP FLOP
Multiplying or Dividing by a Positive and a Negative Number
Negative number as an answer
Multiplying or Dividing by Two Negative Numbers
A positive answer
Complementary
angles add up to 90 degrees
Supplementary
angles add up to 180 degrees
Vertical
sets of angles that form when two lines intersect. Share common vertex.
Adjacent
Two angles that have a common vertex and one common side.
Surface area of a cube
SA = 6(s)(s) or 6 times s squared
Surface area of a Rectangular Prism
SA = 2WL + 2LH + 2WH
Surface area of a Triangular Prism
SA = bh + (s1 + s2 + s3)H
Surface area of a cylinder
SA = 2(3.14)(r squared) + 2(3.14)(r)(h)
Area of a Circle
A = (3.14)(r squared)
Circumference
C= 2(3.14)(r) or C= (3.14)(d)
Volume of a cube
V = LWH
Volume of rectangular Prism
V = LWH
Volume of a Triangular Prism
V = (1/2)LWH
Volume of a Cylinder
V = (3.14)(r squared)(h)
Absolute Value
The distance from the origin to that number on a number line. Number cannot be negative inside of the absolute value bars.
Equation
a mathematical sentence formed by setting 2 expressions equal.
Expression
an expression consisting of at least one variable and also consists of numbers and operations.
Variable
a symbol, usually a letter which is used to represent one or more numbers
Inequality
mathematical sentence formed by placing an inequality symbol between 2 expressions
Triangle Inequality Theorem (T-Rex)
The sum of the lengths of any two sides of a triangle is greater than the length of the third side.
MAD - Mean Absolute Deviation
average distance between each data value and the mean.
Step 1: Find the mean of the data set
Step 2: Find difference between each data value and mean.
Step 3: Find absolute value of each difference (no negatives)
Step 4: Find the mean of positive differences.
Commission
A fee paid for services, percentage of total cost.
tax
Turn tax rate from percentage to decimal and multiply by total amount of purchase. Add this amount to the total amount.
Tip
Turn tip rate or percentage into a decimal and multiply by total amount. Add this amount back to the total amount.
Discount
Turn the discount percentage into a decimal and multiply into original price of item. Subtract this amount from the original price.
Probability
Likelyhood of one or more events happening.
Divide number of events by the total of possible outcomes.
If more than one event, multiply the two events together.
Order of Operations
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction
;