Nursing Entrance Exam

Nursing Preparation Study Guide

When a parenthesis ( is used on the number line, it means that all numbers greater than 2, excluding 2, are to be considered here. In other words, while using inequalities, we may make use of different types of brackets that have different meanings. For instance, ( , ) means the set contains all the numbers between and , excluding and . On the contrary, [ , ] means all numbers between and , including and . Similarly, [ , ) means all numbers between and , inclusive of and exclusive of . This is known an interval notation. Let us understand this using a few examples: Set-Builder Notation Graphical Representation Interval Notation { | > 4} (4, ∞) { | < 2} (−∞, 2) { | ≤ 1} (−∞, 1] { | ≥ −3} [−3, ∞) 3.5.2 Mathematical Translations of Equalities fromWords An equation is used to show that two mathematical expressions are equal to each other. For instance, 2 + 5 = 9 . This is as an equation since the expressions on both sides of the sentence are equal and denoted by the equal to (=) sign. Some of the examples of equations are: 3 + 5 = 8 , 5 – 10 = 10 , 2 ∗ 3 = 8– 2 , or 70 = 280 . In these examples, the expressions on either side of the equal sign are equal to each other. Written sentences can be converted into mathematical expressions so that they can be solved to arrive at meaningful solutions. For instance, “a number is multiplied by 10 and then added to 8 to get 48”. Assume the number is and the mathematical equation becomes: 10 + 8 = 48

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