Algebra is a part of mathematics in which letters and other symbols are used to represent numbers and quantities in formulas and equations.
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A variable is a value that is not always the same number. In alegebra, it is represented as a letter. In the equasion Y=4X+5, 'Y' and 'X' are both variables.
Oh, dude, it's like super easy. You just type in the numbers and symbols for the algebraic expression you want to solve, hit the equal sign, and voilà, the calculator does the magic for you. It's like having a tiny math wizard in your pocket, but without the cool hat.
We're given: 9x + 2x = 121 The first step is to group like terms on the left: (9 + 2)x = 121 11x = 121 Now divide both sides by 11: 11x/11 = 121/11 x = 11
To be an ATC (Air Traffic Controller) you should be familiar with basic math because you essentially have to separate planes by flight levels and know how far those levels are from each other, judge speed of aircraft, and also flight levels. If anything you need to know basic math very quickly. You have to think quick because let's say you have a plane climbing out of an airport to 15,000 feet and you have another plane at level flight in the same area at 12,500. You have to tell one plane to divert to avoid a collision with the other, and remember there are real people on those planes! I would study alegebra, but especially statistics and geometry. Calculus would prove to be useless for an ATC.