Praxis 5001 Mathematics 100% Correct

Praxis 5001 Mathematics 100% Correct Natural Numbers Numbers we use to count (1, 2, 3) Whole Numbers Natural numbers and 0 Integers Whole numbers and their corresponding negatives Rational Numbers All integers and fractions Irrational Numbers Numbers that cannot be expressed as fractions (infinite, non-repeating) PEMDAS Parentheses, Exponents, Multiply, Divide, Add, Subtract Composite Numbers Any positive integer that is not prime (must have more than 2 factors) Multiples Result of multiplying a number by whole numbers Least Common Mulitple Smallest multiple two numbers have in common Factor Whole numbers multiplied together to get a product (20: 1, 2, 4, 5, 10, 20) Ratio Way to compare tow numbers Proportions Two ratios set equal to each other Problem Solving strategies Modeling, estimation, algorithms, mental math, patterns, calculator Arithmetic Sequence Same value added each time Geometric Sequence Same value is multiplied each time Fibonacci Sequence Each number is the sum of the two numbers before it Transitive Property z=y x=z so x=y Distance Formula d= Square root of : (x2-x1)^2 + (y2-y1)^2 Midpoint Formula (x2+x1)/2, (y2+y1)/2 Pythagorean Theorem a2+b2=c2 Quadratic Formula x=b+- Sqaure root (b2-4ac)/2a Slope Formula m=y2-y1/x2-x1 Slope Intercept Formula y=mx+b (m is slope) (b is y intercept) Ray Line with one end point and infinite direction with the other Complimentary Angles 2 angles whose sum 90 degree Supplementary Angles Angles whose measure is 180 degrees Isosceles Triangle Two triangles sides equal in length Scalene Triangle No sides equal in length Trapezoid One pair of parallel sides (4 sides) Rhombus Four equal sides Area for Triangle 1/2 base * height Area of Parallelogram Base * height Area of Rectangle Length * Width Area of square side squared Area of Circle Pie * Radius squared Volume of a prism base * height Volume of a pyramid/cone 1/3 base * height Volume of a sphere 4/3 * pie * radius ^3 Mean Average Median Place # in order and pick the middle number (if two numbers do their mean) Mode # to appear most frequently Range Subtract the lowest from the highest 59-2=57