Difference between revisions of "User:Mastermind77"
Mastermind77 (talk | contribs) (Created page with "remember these things Average formula: Let a1,a2,a3,......,an be a set of numbers, average = (a1 + a2 + a3,+......+ an)/n Fractions formulas: adding-fractions-formula-image ...") |
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Average formula: | Average formula: | ||
| − | Let a1,a2,a3,......,an be a set of numbers, average = ( | + | Let a1,a2,a3,......,an be a set of numbers, average = (quacky + quacky + quacky,+......+ quacky)/duck |
Fractions formulas: | Fractions formulas: | ||
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In a proportion, the product of the extremes (ad) equal the product of the means(bc), | In a proportion, the product of the extremes (ad) equal the product of the means(bc), | ||
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Percent: | Percent: | ||
| − | Percent to fraction: | + | Percent to fraction: quacky% = quacky/100 |
| − | Percentage formula: | + | Percentage formula: quacky/100 = duck/something |
Rate: The percent. | Rate: The percent. | ||
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Have any questions about the basic math formulas? Send me an email here and ask me any questions you want about these basic math formulas | Have any questions about the basic math formulas? Send me an email here and ask me any questions you want about these basic math formulas | ||
this is mastermind77's post of needency! | this is mastermind77's post of needency! | ||
| + | this page was last modified on 12/13/2013 6:29 p.m. | ||
Latest revision as of 19:28, 13 December 2013
remember these things Average formula:
Let a1,a2,a3,......,an be a set of numbers, average = (quacky + quacky + quacky,+......+ quacky)/duck
Fractions formulas: In a proportion, the product of the extremes (ad) equal the product of the means(bc),
Thus, ad = bc
Percent:
Percent to fraction: quacky% = quacky/100
Percentage formula: quacky/100 = duck/something
Rate: The percent. Base: The amount you are taking the percent of. Percentage: The answer obtained by multiplying the base by the rate
Consumer math formulas:
Discount = list price × discount rate
Sale price = list price − discount
Discount rate = discount ÷ list price
Sales tax = price of item × tax rate
Interest = principal × rate of interest × time
Tips = cost of meals × tip rate
Commission = cost of service × commission rate
Geometry formulas:
Perimeter:
Perimeter of a square: s + s + s + s s:length of one side
Perimeter of a rectangle: l + w + l + w l: length w: width
Perimeter of a triangle: a + b + c a, b, and c: lengths of the 3 sides
Area:
Area of a square: s × s s: length of one side
Area of a rectangle: l × w l: length w: width
Area of a triangle: (b × h)/2 b: length of base h: length of height
Area of a trapezoid: (b1 + b2) × h/2 b1 and b2: parallel sides or the bases h: length of height
volume:
Volume of a cube: s × s × s s: length of one side
Volume of a box: l × w × h l: length w: width h: height
Volume of a sphere: (4/3) × pi × r3 pi: 3.14 r: radius of sphere
Volume of a triangular prism: area of triangle × Height = (1/2 base × height) × Height base: length of the base of the triangle height: height of the triangle Height: height of the triangular prism
Volume of a cylinder:pi × r2 × Height pi: 3.14 r: radius of the circle of the base Height: height of the cylinder
Have any questions about the basic math formulas? Send me an email here and ask me any questions you want about these basic math formulas this is mastermind77's post of needency! this page was last modified on 12/13/2013 6:29 p.m.
