Q: What are some real life applications of linear algebra?

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By definition, none. For if it did have real life applications it would not be called abstract! +++ You could consider it as establishing the rules by which the algebra needed to perform real-life tasks works. For a simple example, if C = AB then you could say, "Fine, suppose we call A and B the sides of rectangle than C is its area, OR if we call A and B speed and time respectively then C is the distance travelled. In both cases the algebraic rules are the same: multiply two values and you obtain their product; but many practical applications are in fact simple products so there we have the underlying pure algebra for solving them. And from that we can use pure algebra rules to determine A or B from the others.

You could use algebra in real life in nearly anything that you do. You could use algebra to calculate how much gas you will put in your car and how much it will cost you.

Differential equations, Linear Algebra, Abstract Algebra, Real and Complex Analysis, Advanced Calculus, and lots of other fun stuff.

No. For example, linear algebra, for example, is about linear equations where the domain and range are matrices, not simple numbers. These matrices may themselves contain numbers that are real or complex so that not only is the range not the real numbers, but it is not based on real numbers either.

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Cell phone companies

By definition, none. For if it did have real life applications it would not be called abstract! +++ You could consider it as establishing the rules by which the algebra needed to perform real-life tasks works. For a simple example, if C = AB then you could say, "Fine, suppose we call A and B the sides of rectangle than C is its area, OR if we call A and B speed and time respectively then C is the distance travelled. In both cases the algebraic rules are the same: multiply two values and you obtain their product; but many practical applications are in fact simple products so there we have the underlying pure algebra for solving them. And from that we can use pure algebra rules to determine A or B from the others.

You could use algebra in real life in nearly anything that you do. You could use algebra to calculate how much gas you will put in your car and how much it will cost you.

shopping, travel, measurements and money are the real life applications of real number system.

Differential equations, Linear Algebra, Abstract Algebra, Real and Complex Analysis, Advanced Calculus, and lots of other fun stuff.

No. For example, linear algebra, for example, is about linear equations where the domain and range are matrices, not simple numbers. These matrices may themselves contain numbers that are real or complex so that not only is the range not the real numbers, but it is not based on real numbers either.

Your age is a linear function (of time).

Yes if it was not practical it was not there. You can see the real life use on this link http://www.intmath.com/Applications-differentiation/Applications-of-differentiation-intro.php

There are no real life applications of reciprocal functions

in real life what are applications of alanlytical geometry

There are many examples of daily life applications of real numbers. Some of these examples include clocks and calendars.

Read word problems in a math book. Joe pays 25 dollars for 3 cds. At the same rate, what should he pay for 105 cds?