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Answers by Maurice S.

Looking at the equation, x+y=8, I can subtract either x or y from both sides to get the following two equations: x = 8 - y,     or    y = 8 - x. So I now have an expression which I can substitute for either x or y. Now, looking at the equation,...

Changing the subject of a formula on the mathisfun.com page refers to rearranging an equation to solve for a different variable.  This can only be done using valid algebraic operations, always remembering that both sides of the equation have to be changed in equivalent ways so that the equal...

The problem posed is 5-3*54. Now, 54 is 5*5*5*5. What, however, is 5-3?0 Now, 53 is 5*5*5 and 52 is 5*5. Extending this, 51 is 5 and 50 is 5/5 which is 1 So 5-1 would be 1/5, 5-2 would be 1/(5*5), and 5-3 would be 1/(5*5*5). So, 5-3*54 is (5*5*5*5)/(5*5*5) = 5....

To add some other differences to Dannie's answer: You affect something by changing it - the wonderful weather affected my mood! You effect a change in something - he was strong enough to effect a change in the pressure of the car on my foot. Something has an effect on you - The effect...

This is a somewhat surprising question, because it seems a little strange that the printed matter should cover 0 square centimeters.  However, given the information in the question, this would mean that the entire page must be margins. Looking at the width of the page, which is 10 centimeters,...

X+7=-2(4x+10) (answer)

Hi Taylor, The important thing to do is group the 'x's on one side of the equal sign, and the numbers without 'x's on the other side.  However, before you can do that you need to get the 4x inside the parentheses out of parentheses. So, first, use the distributive property of multiplication...

While Robert's answers are correct, he didn't find them by using the quadratic formula. The formula is very difficult to write in this wordprocessor, but it goes like this:      t  =  ( - b plus or minus the square root of ( b2 - 4ac ) ) all over 2a where   ...

While Robert's answer is correct, it will only work for multiplying by numbers that end in 9.  A more general answer is: One can look at this as (50 + 9) * (50 + 3) So one has to multiply 50 * 50, 50 * 3, 9 * 50, and 9 * 3, and then add them all together. So 2500 + 150...

calculator (answer)

If you are using a computer to post this question, both Windows and Mac have calculators built into the computer's software.  In Windows, it is in the Accesories group in the Start menu.  In Apple, a simple search for calculator should help you find it.  Barring that, you can use...

Solve for a means to rewrite the equation so that it starts a=. Since this equation starts 9a=, we need to remove the 9. What is the 9 doing to the a?  9a means 9 multiplied by a, so the 9 is multiplying the a. To remove the 9, we have to do the opposite of what it is doing to the...

(3,y)(1,9) (answer)

This is not an answer to the question, but rather we need some more information. These look like coordinates on a graph - is this homework related to graphs?  Maybe having to do with finding the slope, or finding the distance between two points. It might also be a question about ratios...