Thirteen is seven more than one-fifth of a number. O 13 = 7n + O 13 + = 7n O 13 = =n + 7 O 13 = 7 +n 1/5

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A:

Q: 45% of what is 27?

A: Let 45% of x = 27

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Q: (b) Ten times the sum of nine and seven

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Q: cutting

A: A fraction denotes part of a whole. For example: 23 denotes 2 parts out of total 3 parts.

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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.