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Bill F.'s Resources

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An equation (math expression with an equal (=) sign) is like a seesaw or teeter-totter:  both need to remain balanced to work correctly.  If you adjust or change the weight on one side of a seesaw, then you have to also adjust or change weight on the opposite side until it is balanced...

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6/2(1+2)= ? (answer)

A common way to remember the order of operations is the abbreviation "PEMDAS", which is turned into the phrase "Please Excuse My Dear Aunt Sally".  It stands for "Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction". Assuming you...

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algebra help (answer)

See answers under the same problem you entered as "math help please"

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math help please (answer)

Let's state what we know:  both fat-content chocolates added together will be 200 kg Let's let x = the 20% fat-content chocolate, and y = the 40% fat-content chocolate (but we could use any 2 letters or symbols) So we know that x + y = 200 Let's state the percentages as decimals:...

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You don't state if you put the card back into the deck after each attampt or not, and if there are Jokers in the deck or not (or only 52 cards of 13 in each of 4 suits). If yes (cards are reinserted into the deck and it's a standard deck of 52 with no jokers), then you have a 1/4 chance of winning...

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Can you help me? (answer)

For the first, divide 2x3 - 5x2 -28x + 15 by (x - 5).  You should get 2x2 + 5x - 3.  Now you can factor that:  look for combinations of 1, 2, and 3 that can add to 5 (for 5x) and multiply to get -3.  Let's try (2x - 1) and (x + 3), since (-1)(+3) =...

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What you are missing is a simple formula:  I=PRT.  Means Interest (in dollars, not %) = Principal (downpayment or original savings) X Rate (percentage rate as a decimal:  5% = 0.05) X Time (in years - convert months into decimal part of 1 year).  You can also change that...

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The pattern of this equation may look familiar to you... remember y=mx+b?  Called the slope-intercept form, because the cooefficient (multiplier) for x, represented by the letter m, is the "slope", or tilt, of the line on an x-y graph.  The b represents where the equation...

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I'm making a few assumptions here:   1.  Your problem is Inverse Sine of 1.325 radians (not degrees) 2.  By Inverse Sine you also mean Sine-1 or ArcSin A trig (Trigonometry) table gives ArcSin(1.325 radians) = 14.07°, or x = 0.970

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It looks like you may have answered your own question. In practical, useful every-day terms, a straight edge is anything with a hard, stright-line edge, which we normally use to mark or cut a straignt line in some material (wood, cloth, etc.).  An example is the edge of any normal school...

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Without seeing any of your graph choices, no way to directly answer :-)  But we do know some things:  because there are no exponents (x2 or x3, etc.), we already know that this is a "linear equation".  Linear means straight line, and the graph is a straight line...

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"Common" means something that applies to two or more of the same or similar things.  In this case, "common demoninator" means one denominator (bottom part of a fraction, or the divisor) that can be used by two or more fractions with denominators.  In your example,...

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And looking at it using only one variable: Let's say Brianna has x dollars.  Then Julia has (1/3)(x), or x/3 dollars (1/3 as many x as Brianna). Joseph has 12 less than Julia, or (x/3)-(12) dollars.  All three together have $113 dollars, so... x + x/3 + (x/3)-12 = 113   Get...

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Adding more information about the diagonals in a Parallelogram: In a parallelogram, diagonally-opposite angles are equal.  Diagonals drawn which divide these agles into two angles in each corner create opposite equal angles:  the inside corner angles made between a diagonal and any...

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Ratio and proportion are slightly different viewpoints of the same idea:  using what you know to quantify what you don't yet know.  It's like having a replica model of the house you want ot build:  if the length of your model house is 2 feet and the width is 1 foot, then you can...

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If n is + or - infinity, then it is undefined (has no meaning), and therefore any expression using n would also be undefined.  If n = √-1 then it is an imaginary (also undefined) number, and n would equal i, so 2n+1 = 2i+1. Otherwise, any 2n+1 should be a valid and real...

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Without parentheses and brackets to isolate each term, I'm not sure I correctly read your question.  I think your problem is (-6) < [(n/9)-5].  If yes, then here's how I would solve it: Treat the inequality sign ( < ) just as you would an equal ( = ) sign. Get the term...

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3 conic section types:   Parabola (when a cone is cut in a direction parallel to the cone's slanted side) Hyperbola (when a cone is cut at a vertical angle, perpendicular to the flat base) Ellipse (when a cone is cut at any other angle than a parabola or hyperbola) - a circle...