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51 Cards in this Set
- Front
- Back
Factor or Divisor =
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Any integer that leaves no remainder (i.e a reaminder of 0) when it is dvided into another integer:1, 2, 5, 10 are the factors (or divisors) of 10
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Prime Number
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A positive integer that has exactly two divisors. The first few primes are 2, 3, 5, 7, 11, 13, 17 (not 1)
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bm bn
b raise to m, b raise to n = |
bm
-- = (m -n) bn b |
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m n
(b ) = |
mn
b |
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2
(squ a) = |
sq a * sq a
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To compare two fractions
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convert them to decimals by dividing the numerator by the denominator
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To multiply two fractions,
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Multiply their numberator and multiply their denominators
3/5 * 4/7 = 3*4/5*7 = 12/35 |
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To divide any number by a fraction
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Multiply that number by the reciprocal of the fraction
3/5 divided by 2/3 = 3/5* 3/2 = 9/10 |
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To add or subtract fraction with different denominators, f
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first rewrite the fraction as equivalent fractions with the same denominator:
1/6+3/4 = 2/12 + 9/12 = 11/12 |
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Percent increase of qty =
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Actual increase
------------ * 100% Original amount |
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Percent decrease of qty =
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Atcual decrease
---------- * 100% Original amount |
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Ratio of 2 to 3 =
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2/3 or 2:3
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Average of set of n numbers
= |
Sum of the numbers
------------------ n |
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Probability =
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Favorable Outcomes
------------- Total Possible Outcomes |
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Percent Formula
Part = |
Percent * Whole
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The 3 exterior angles of a triangle add up to
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360 degrees
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In any triangle, the sume of the measure os the three angles is
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180 degrees
x+y+z = 180 |
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In any triangle
1) The longest side |
= is the opposite the largest angle
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2) the shortest side
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= is the opposite the smallest angle
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3)Sides with the same length
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= Are opposite angles with the same measure
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In a 45-45-90 right triangle, the sides are =
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X, X, and X square 2
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In a 30-60-90 right triangles, the sides are =
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X, X Square 3 and 2X
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Area of Right trinagle =
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1/2 * base * height
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Area of an equilateral triangle with equal sides =
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2
S * Square 3 --------- 4 |
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In any quadrilateral, the sume of the measures of the four angles
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= 360 degrees
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For Parallelogram
Area = |
Base * Height
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Perimeter of Pallelogram =
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2(a + b)
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Area of Rectangele =
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Length * Width
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Perimeter of Rectangel =
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2(L + W)
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Area of a Square =
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2
S |
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Area of a square can also be =
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1 2
- d 2 |
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Perimeter of a square =
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4s (s = sides)
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Diameter of a circle =
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2* radiuis
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Circumference of a Cirle =
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PI * D = 2 PI R
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Area of a circle =
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2
PI r |
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Length of an Arc
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(n/360) * (2PI r)
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Area of a sector, if n is the degree measure of the sector's central angle =
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2)
(n/360) * (PI r PI * R square |
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Surface Area of Rectangular =
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2(LW +LH + WH)= 2LW +LH +2 WH
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Suface Area of cube =
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6e square
6 * e square |
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Volume of a cylider =
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PI * R square * height
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Surface of a cylinder =
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2PI r h
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Volume of a Rectangular solid =
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L * W * H
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Volume of a cube =
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3
L * L * L = L |
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Average speed =
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Total Distance
---------- Total time |
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Average A per B =
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Total A
----- Total B |
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Probability formula
Probability = |
Number of Favorable Outcome/
Total no. of Possible Outcomes |
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If E is impossible, then P(E) =
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0
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If it is certain that E will occur, then P(E)=
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1
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In all other cases
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0 <P(E)<1
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The probability that the even E will not occur =
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1- P(E)
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Counting principle: if two jobs need tobe completed and there are m ways to do the first job and n ways to the second job, then there are
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m * n ways to do one job followed by th eother
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