By Mary Jane Sterling
The learn-by-doing strategy to grasp Algebra I
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Inside youll get the perform you want to examine Algebra I, together with:
- Basic concepts
- Working with numbers
Equations and capabilities
- Linear equations
- Algebraic fractions
- Polynomials and factoring
- Inequalities and absolute worth inequalities
- Quadratic equations
- Systems of equations
- Clear, concise studies of each topic
- Practice difficulties in each chapterwith motives and solutions
- Complete bankruptcy on tale problems
- Diagnostic pretest to evaluate your present skills
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Extra resources for Algebra I: Pt. I
All real numbers Pretest 21 134. Which is the inverse of the function f (x) = 3x - 1? A. f - 1 (x) = 1 3x - 1 -1 1 B. f (x) = 3 x + 1 +1 C. f - 1 (x) = x 3 135. One number is 1 more than 3 times another. Their sum is 21. What is their product? A. 16 B. 80 C. 100 136. The sum of 3 consecutive odd integers is 99. What is the largest of them? A. 33 B. 35 C. 41 137. Ken is three times as old as Karen. In 10 years, he’ll be twice as old as Karen. How old is Karen? A. 5 B. 10 C. 20 138. A rectangle has a length that is 2 inches more than twice the width.
1,7) B. (1,-1) C. (7,-1) 131. Which of the following is a function of x? A. x 2 + y 2 = 7 B. y = 3x + 2 C. y 2 =- 5x - 1 132. What is the domain of the function y = x - 7? A. x ≥ 7 B. x ≤ 7 C. all real numbers 133. What is the range of the function y = x 2 + 3? A. y ≥ 0 B. y ≥ 3 C. all real numbers Pretest 21 134. Which is the inverse of the function f (x) = 3x - 1? A. f - 1 (x) = 1 3x - 1 -1 1 B. f (x) = 3 x + 1 +1 C. f - 1 (x) = x 3 135. One number is 1 more than 3 times another. Their sum is 21.
For the product to be 0, one of the numbers must be 0. There’s no other way to get the 0 when you’re multiplying. That’s an easy $100. ” Compare that to a similar puzzle: “I’m thinking of two numbers, and their product is 36. ” Unless you’re really lucky, you won’t be able to guess what either number is, because the puzzler has an infinite (uncountable) number of choices. Here are a few: 1 , 108 $ 1 , g. This can go on forever, because there’s no end to the 36 $ 1, 18 $ 2, 9 $ 4, 6 $ 6, 72 $ 2 3 43 Chapter 1: The Basics combinations that can be used.