By Jerry Bobrow (author), Ed Kohn (revisor)
Contained in the Book:Preliminaries and easy OperationsSigned Numbers, Frac-tions, and PercentsTerminology, units, and ExpressionsEquations, Ratios, and ProportionsEquations with Vari-ablesMonomials, Polynomials, and FactoringAlgebraic FractionsInequalities, Graphing, and Absolute ValueCoordinate GeometryFunctions and VariationsRoots and RadicalsQuadratic EquationsWord ProblemsReview QuestionsResource CenterGlossaryWhy CliffsNotes?Go with the identify you recognize and trust...Get the data you need—fast!CliffsNotes speedy evaluation courses offer you a transparent, concise, easy-to-use overview of the fundamentals. Introducing every one subject, defining keyword phrases, and punctiliously jogging you thru pattern difficulties, this advisor is helping you grab and comprehend the real innovations had to succeed.Master the Basics–FastComplete assurance of middle conceptsEasy topic-by-topic organizationAccess enormous quantities of perform difficulties at CliffsNotes.com
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Additional info for Algebra I: Quick Review, 2nd Edition (Cliffs Notes)
Ratios A ratio is a method of comparing two or more numbers or variables. Ratios are written as a:b or in working form, as a fraction. Chapter 4: Equations, Ratios, and Proportions 53 Notice that whatever comes after the “to” goes second or at the bottom of the fraction. Proportions Proportions are written as two ratios (fractions) equal to each other. Example 10: Solve this problem for x. p is to q as x is to y First the proportion may be rewritten. Now simply multiply each side by y. Example 11: Solve this proportion for t.
Example 7: Multiply or divide the following. (a) (–3)(+8)(–5)(–1)(–2) = +240 (b) (–3)(+8)(–1)(–2) = –48 Chapter 2: Signed Numbers, Fractions, and Percents 23 Fractions A fraction, or fractional number, is used to represent a part of a whole. Fractions consist of two numbers: a numerator (which is above the line) and a denominator (which is below the line). The denominator tells you the number of equal parts into which something is divided. The numerator tells you how many of these equal parts are being considered.
Example 1: Add the following. When adding two numbers with different signs (one positive and one negative), subtract the absolute values and keep the sign of the one with the larger absolute value. Chapter 2: Signed Numbers, Fractions, and Percents 21 Example 2: Add the following. Example 3: Add the following. Answers: (a) 15 (b) –3 (c) 3 (d) 5 Subtraction of signed numbers To subtract positive and/or negative numbers, just change the sign of the number being subtracted and then add. Example 4: Subtract the following.
Algebra I: Quick Review, 2nd Edition (Cliffs Notes) by Jerry Bobrow (author), Ed Kohn (revisor)