| [+] Radical Expressions |
| [+] Random Number Generator |
| [+] Random Sampling from the Normal DistributionFree Random Sampling from the Normal Distribution Calculator - This performs hypothesis testing on a sample mean with critical value on a sample mean or calculates a probability that Z <= z or Z >= z using a random sample from a normal distribution. Features: Calculator | Quiz Generator | Practice Problem Generator Tags:
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| [+] Random TestFree Random Test Calculator - Given a set of data and an α value, this determines the test statistic and accept/reject hypothesis based on randomness of a dataset. Features: Calculator | Quiz Generator Tags:
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| [+] Rates of ReturnFree Rates of Return Calculator - Given a set of stock prices and dividends if applicable, this calculates the periodic rate of return and the logarithmic rate of return Features: Calculator | Practice Problem Generator Tags:
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| [+] Ratio Word ProblemsFree Ratio Word Problems Calculator - Solves a ratio word problem using a given ratio of 2 items in proportion to a whole number. Features: Calculator | Practice Problem Generator Tags:
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| [+] Rational Exponents - Fractional Indices |
| [+] Rational Number SubtractionFree Rational Number Subtraction Calculator - Subtracting 2 numbers, this shows an equivalent operations is adding the additive inverse. p - q = p + (-q) Features: Calculator | Practice Problem Generator Examples (1): 15-5 Tags:
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| [+] Rational NumbersFree Rational Numbers Calculator - This lesson walks you through what rational numbers are, how to write rational numbers, rational number notation, and what's included in rational numbers Features: Calculator | Practice Problem Generator | Watch the Video Tags:
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| [+] Rational Numbers Between |
[+] Rational,Irrational,Natural,Integer PropertyFree Rational,Irrational,Natural,Integer Property Calculator - This calculator takes a number, decimal, or square root, and checks to see if it has any of the following properties: * Integer Numbers * Natural Numbers * Rational Numbers * Irrational Numbers Handles questions like: Irrational or rational numbers Rational or irrational numbers rational and irrational numbers Rational number test Irrational number test Integer Test Natural Number TestFeatures: Calculator | Practice Problem Generator | Watch the Video Examples (4): is 34 natural is 85.6 rational prove 99.7 is rational is 45 an integer Tags:
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| [+] Ratios |
| [+] Real Numbers |
| [+] Rebound Ratio |
| [+] Receivables RatiosFree Receivables Ratios Calculator - Given Net Sales, Beginning Accounts Receivable, and Ending Accounts Receivable, this determines Average Accounts Receivable, Receivables turnover ratio, and Average Collection Period. Features: Calculator | Practice Problem Generator Tags:
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| [+] Rectangle Word Problem |
| [+] Rectangles and Parallelograms |
| [+] Rectangular Number |
| [+] Rectangular Solid |
| [+] Reference Angle |
| [+] Reflexive Property |
| [+] Regrouping |
| [+] Relative CoordinatesFree Relative Coordinates Calculator - Given a starting point (x1,y1), this will determine your relative coordinates after moving up, down, left, and right. Features: Calculator | Quiz Generator | Practice Problem Generator | Watch the Video Examples (2): Starting at a point of (1,5), you move 2 spaces up, 3 spaces left Starting at a point of (1,5), you move 2 spaces up, 8 spaces right, 7 spaces down, 3 spaces left Tags:
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| [+] Relative Error |
| [+] Repeating Decimal |
| [+] Resistor Color Codes |
| [+] RGB and HEX conversions |
[+] RhombusFree Rhombus Calculator - Given inputs of a rhombus, this calculates the following: Perimeter of a Rhombus Area of a Rhombus Side of a RhombusFeatures: Calculator | Watch the Video Tags:
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| [+] Right TrianglesFree Right Triangles Calculator - This solves for all the pieces of a right triangle based on given inputs using items like the sin ratio, cosine ratio, tangent ratio, and the Pythagorean Theorem as well as the inradius. Features: Calculator Tags:
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| [+] Roman Numeral Conversions |
| [+] Roster Notation |
| [+] ROT-13 Conversions |
| [+] Roulette |
| [+] Roulette Cumulative BettingFree Roulette Cumulative Betting Calculator - This calculator displays the probability and return grid for a roulette scenario where you play x games, betting y per number playing z numbers per game. Features: Calculator | Practice Problem Generator Tags:
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| [+] Rounding |
| [+] Rounding to Decimal Places |
| [+] Rule of 72 |
| [+] Rule of Succession |
| [+] Run Length Encoding |
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