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Order DOES MATTERS
n!/(n-k)! |
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Order DOES NOT matter
n!/k!(n-k)! |
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P(1+r/c)*nc
p=principle
r=annual interest rate as a decimal
c=number of compoundings per year
n=number of years
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1) equivalent ratios
2) Portioning into ratios |
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| equivalent ratios equation |
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| 2 ways to find distance between 2 points |
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*Draw a right triangle from points. Use "common" sense to count space for 2 legs of triange. Use pythagorem theorem to solve for the 3rd side.
*The distance Formula |
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| express great LOATHING for. |
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| Square root of (x1-x2)*2 + (y1-y2)*2 |
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| Solve quadratic equations by.... |
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| FACTORING!!!! Anything squared start factoring ASAP!!!!! |
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| VERTICAL LINE (opposite of what you think) |
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| Percent Change Equation: Percentage increase & decrease |
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| (end value-start value)/start value x100% |
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| The number of integers from x to y inclusive. |
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| A certain island has 11 rats. If the rat population doubles every 3 months, what will be the population in 15 months. |
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*Odd. Median is the middle number
*Even. Is the average of the 2 middle numbers. |
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| Sum of n numbers is equal to |
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| If the numbers in a set are evenly spaced then the mean and ____ are equal. |
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median
(converse not necessarily true) |
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| If population A is greater than Population B. average of combined group is closer to.... |
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