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# Solutions for Chapter 7.2: Systems of Linear Equations in Three Variables

## Full solutions for Precalculus | 4th Edition

ISBN: 9780321559845

Solutions for Chapter 7.2: Systems of Linear Equations in Three Variables

Solutions for Chapter 7.2
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##### ISBN: 9780321559845

Precalculus was written by Patricia and is associated to the ISBN: 9780321559845. This expansive textbook survival guide covers the following chapters and their solutions. Since 55 problems in chapter 7.2: Systems of Linear Equations in Three Variables have been answered, more than 21151 students have viewed full step-by-step solutions from this chapter. This textbook survival guide was created for the textbook: Precalculus, edition: 4. Chapter 7.2: Systems of Linear Equations in Three Variables includes 55 full step-by-step solutions.

Key Calculus Terms and definitions covered in this textbook

If u = v and w = z , then u + w = v + z

• Angle of elevation

The acute angle formed by the line of sight (upward) and the horizontal

• Boundary

The set of points on the “edge” of a region

• Determinant

A number that is associated with a square matrix

• Dihedral angle

An angle formed by two intersecting planes,

• Direction of an arrow

The angle the arrow makes with the positive x-axis

• Division

a b = aa 1 b b, b Z 0

• Domain of a function

The set of all input values for a function

• Mean (of a set of data)

The sum of all the data divided by the total number of items

• Natural exponential function

The function ƒ1x2 = ex.

• Orthogonal vectors

Two vectors u and v with u x v = 0.

• PH

The measure of acidity

• Polar axis

See Polar coordinate system.

• Probability distribution

The collection of probabilities of outcomes in a sample space assigned by a probability function.

• Probability function

A function P that assigns a real number to each outcome O in a sample space satisfying: 0 … P1O2 … 1, P12 = 0, and the sum of the probabilities of all outcomes is 1.

• Richter scale

A logarithmic scale used in measuring the intensity of an earthquake.

• Solve a triangle

To find one or more unknown sides or angles of a triangle

• Subtraction

a - b = a + (-b)

• Terminal side of an angle

See Angle.

• Trigonometric form of a complex number

r(cos ? + i sin ?)

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