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(-10+4)-(-3) /-7-2 how do i do the real numbers and their representation

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Here's how start first with the parenthesis (-10+4)=-6
=-6minus-3 is = -3
next thing to do is to solve -7-2 so it is = to -9
get the to result the -3 and -9 and then do this -3/-9 so if it is fraction it would be like this 1/3 as you can see the negative is gone. And if it is not a fraction here's how it would look like 0.3333333 unlimited no. 3 but its okay if you put just 0.3

Posted on Dec 08, 2012


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What is the algebraically? The number of days in w weeks.


It depends on the context and on the algebraic representation that you want to use. Studying "mathematical thinking" I learned that you can model an infinity of mathematical representations around any real-life problem. The same is valid if you restrict the possible mathematical fields to Algebra.

I am not sure if "w weeks" was a mistake or if w is the number of weeks.

If w is the number of weeks the most immediate algebraic representation is 7w. This can be represented in decimal system or using a different base (for most applications base 7).

The most common representation of the number of days in a single week is the number 7. Representing the number of days with 7 you will be for example using a base ten system to represent the weekdays within a larger set of number (e.g. Natural numbers, Positive Integers, or the 365 days of the year.

A common exercise is representing the number of week days while doing base n or module n maths. If required in this context the answer will be a representation in base 7. In that case the number of days in a week can be represented using 7 numbers (instead of ten).The algebraic representation will be the numbers: 0,1,2,3,4,5,6 . Such representation is often written as 7n or called "module 7" representation (probably 7w if the spare w in your question is not a mistake).

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