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# Solutions for Chapter 7.1: Systems of Linear Equations in Two Variables ## Full solutions for Precalculus | 4th Edition

ISBN: 9780321559845 Solutions for Chapter 7.1: Systems of Linear Equations in Two Variables

Solutions for Chapter 7.1
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##### ISBN: 9780321559845

This textbook survival guide was created for the textbook: Precalculus, edition: 4. This expansive textbook survival guide covers the following chapters and their solutions. Chapter 7.1: Systems of Linear Equations in Two Variables includes 115 full step-by-step solutions. Since 115 problems in chapter 7.1: Systems of Linear Equations in Two Variables have been answered, more than 67348 students have viewed full step-by-step solutions from this chapter. Precalculus was written by and is associated to the ISBN: 9780321559845.

Key Calculus Terms and definitions covered in this textbook
• Absolute value of a real number

Denoted by |a|, represents the number a or the positive number -a if a < 0.

• Additive inverse of a real number

The opposite of b , or -b

• Basic logistic function

The function ƒ(x) = 1 / 1 + e-x

• Cosecant

The function y = csc x

• Equally likely outcomes

Outcomes of an experiment that have the same probability of occurring.

• Expanded form

The right side of u(v + w) = uv + uw.

• Graph of a polar equation

The set of all points in the polar coordinate system corresponding to the ordered pairs (r,?) that are solutions of the polar equation.

• Identity properties

a + 0 = a, a ? 1 = a

• Inverse properties

a + 1-a2 = 0, a # 1a

• Logarithmic form

An equation written with logarithms instead of exponents

• Measure of an angle

The number of degrees or radians in an angle

• n factorial

For any positive integer n, n factorial is n! = n.(n - 1) . (n - 2) .... .3.2.1; zero factorial is 0! = 1

An angle in standard position whose terminal side lies on an axis.

• Recursively defined sequence

A sequence defined by giving the first term (or the first few terms) along with a procedure for finding the subsequent terms.

• Reflection across the x-axis

x, y and (x,-y) are reflections of each other across the x-axis.

• Slope-intercept form (of a line)

y = mx + b

• Standard position (angle)

An angle positioned on a rectangular coordinate system with its vertex at the origin and its initial side on the positive x-axis

• Stemplot (or stem-and-leaf plot)

An arrangement of a numerical data set into a specific tabular format.

• Symmetric difference quotient of ƒ at a

ƒ(x + h) - ƒ(x - h) 2h

• Vertical translation

A shift of a graph up or down.

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