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30 Cards in this Set

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 integers are whole #s exponential growth: Sn= first term - nth term divided by 1 - ratio between consecutive terms union of elements (U) elements that are in either or both intersection of elements (N) common to both sets relative primes have no prime factors in common the "part" keywords is/are the "whole" keywords of percent formula part= percent x whole to increase a # by a percent add percent to 100, conver to decimal, and multiply finding the original whole ex. 25 percent increase over x is 1.25x. ratios of ---- to part to part ratios each # in original ratio over the sum of the #s average speed! average speed= total distance / total time v= d/t mode value that appears most often probability favorable outcomes/ total possible outcomes inverse variations xy=k k is constant distance formula d= square root (x1-x2)2 + (y1-y2)2 midpoint formula (x1 + x2 / 2) , (y1 + y2 / 2) exterior angles of a triangle are equal to the sum of the remote interior angles the 3 exterior angles of a triangle add up to 360 degrees triangle inequality theorem the length of 1 side of a triangle must be greater than the difference and less than the sum of the other two sides 30-60-90 triangle x: x (radical 3) : 2x 45- 45- 90 triangle x: x: x(radical 2) interior angles of a polygon sum of angles = (n-2) x 180 n is # of sides circumference of cirlce C= 2 pie r area of circle pie r squared area of a sector of circle (n / 360) (pie r squared) surface area of rectangle solid SA= 2lw + 2wh + 2lh volume of recntagular solid V= lwh volume of cylinder v= (pie r squared) x h