5 X, + 3 X, + 2 X, = 11 4 X, + 8X, — 3 х, — 9 5 X, + 3 X, + 2 X = 15
Chapter8: Sequences, Series,and Probability
Section8.6: Counting Principles
Problem 5ECP: How many permutations of the letters W, X, Y, and Z are possible?
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Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
Linear Functions
A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
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4. Calculate how much the variables X 1, X 2 and X 3 from the simultaneous equation below:
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