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Hint

1

density formula

density = mass/volume

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2

speed formula

speed = distance/time

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3

vertex formula

y = a(x - h)² + k

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4

completing the square

c = (b/2)²

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5

zero product property

if ab = 0, either a = 0 or b = 0

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6

trigonometry in different quadrants

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7

product of the roots

c/a

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8

sum of the roots

-b/a

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9

percent change (increase/decrease)

new - old / old

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10

compound interest

A = P(1 + r)^t

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11

compound interest (but its compounded more than once per year)

A = P (1 + r/n)^nt (n is the number of times interest is compounded per year)

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12

simple interest

A = P(1 +rt)

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13

sum of angles in a polygon

180(n-2)

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14

exterior angle

sum of the two angles furthest away from it

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15

finding vertex formula

-b/2a

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