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SAT Math
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Gravity
Key Concepts:
Terms in this set (43)
Distance Formula
Midpoint Formula
Special Right Triangles
Length of An Arc
Arithmetic Sequence
Geometric Sequence
Prime Factorization
Greatest Common Factor
Part
Percent x Whole
Percent
Part / Whole
Whole
Part / Percent
Percent Change
amount of change / original amount x 100
Percent Increase
(new amount - original amount) / original amount x 100
Percent Decrease
(original amount - new amount) / original amount x 100
Amount Increase/Decrease
original price x percent markup (markdown)
Original Price
new price / (whole + or - percent markdown/up)
Repeated Percent Change
Final Amount = original amount x (1 + or - rate)^# of changes
Simple Interest
Ratios
1.Total all parts
2. Divide the whole by the total number of parts
3. Multiply quotient by corresponding part of ratio
Direct Proportion
corresponding ratio parts change in the same direction (increase/decrease): write as fraction and cross multiply
Indirect Proportion
corresponding ratio parts change in opposite directions: write as fraction and cross multiply
Exponent Rules Multiplication
Exponent Rules Power of Zero
Exponent Rules Parentheses
Exponent Rules Division
Exponent Rule Negatives
Exponent Rules Fractions
FOIL
Inequalities
Substitution Method
Rate of Change/Slope
Factoring a Quadratic
Quadratic Formula
Rules of Functions
Composition of Functions
Replace each x in the formula of f(x) with the entire formula of g(x)
Inverse of a Function
1. Replace f(x) with y
2. Replace every x with a y and every y with an x
3. Solve the equation from Step 2 for y
Replace y with f^-1 (x)
Fundamental Counting Principle
Permutations and Combinations
Probability Equation
Interior Angles of a Polygon
Sum of the angles = (n-2) x 180 (n is the number of sides)
Length of an Arc
Length of an Arc = (central angle/360) x 2πr
Area of a Sector
Area of a Sector = (central angle/360) x πr²
Motion Equation
D = R x T
Distance = Rate x Time
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