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Rationales Included
, quadratic formula [-b ± √(b² - 4ac)] / (2a)
slope formula (y₂- y₁) / (x₂- x₁)
integers ..., -3, -2, -1, 0, 1, 2, 3, ...
rationals fractions (anything expessable as a ratio of integers)
reals integers, rationals, plus special #s (like √2 or pi)
order of opperations PEMDAS (Parentheses / Exponents / Multiply / Divide / Add / Subtract)
Arithmetic Sequences t₁, t₁+ d, t₁+2d, ...
Geometric Sequences t₁, t₁· r, t₁· r², ...
Factors ex. factors of 52 are 2, 4, 13, and 26
Multiples ex. multiples of 20 are 40, 60, 80, 100, ...
percentages part = (percent / 100) x whole
average average = sum of terms / number of terms
average speed average speed = total distance / total time
sum sum = average x (number of terms)
mode mode = value in the list that appears most often