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# Solutions for Chapter 7.2: Two-Variable Linear Systems

## Full solutions for Precalculus | 7th Edition

ISBN: 9780618643448

Solutions for Chapter 7.2: Two-Variable Linear Systems

Solutions for Chapter 7.2
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##### ISBN: 9780618643448

This textbook survival guide was created for the textbook: Precalculus, edition: 7. This expansive textbook survival guide covers the following chapters and their solutions. Since 87 problems in chapter 7.2: Two-Variable Linear Systems have been answered, more than 37548 students have viewed full step-by-step solutions from this chapter. Chapter 7.2: Two-Variable Linear Systems includes 87 full step-by-step solutions. Precalculus was written by and is associated to the ISBN: 9780618643448.

Key Calculus Terms and definitions covered in this textbook
• Base

See Exponential function, Logarithmic function, nth power of a.

• Circle

A set of points in a plane equally distant from a fixed point called the center

• Common difference

See Arithmetic sequence.

• Course

See Bearing.

• Dependent event

An event whose probability depends on another event already occurring

• Fitting a line or curve to data

Finding a line or curve that comes close to passing through all the points in a scatter plot.

• Focal length of a parabola

The directed distance from the vertex to the focus.

• Function

A relation that associates each value in the domain with exactly one value in the range.

• Leibniz notation

The notation dy/dx for the derivative of ƒ.

• Linear regression line

The line for which the sum of the squares of the residuals is the smallest possible

• NDER ƒ(a)

See Numerical derivative of ƒ at x = a.

• Normal curve

The graph of ƒ(x) = e-x2/2

• Open interval

An interval that does not include its endpoints.

• Polar coordinates

The numbers (r, ?) that determine a point’s location in a polar coordinate system. The number r is the directed distance and ? is the directed angle

• 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.

• Product of functions

(ƒg)(x) = ƒ(x)g(x)

• Quartic function

A degree 4 polynomial function.

• Quotient of complex numbers

a + bi c + di = ac + bd c2 + d2 + bc - ad c2 + d2 i

• Second quartile

See Quartile.

• Vector

An ordered pair <a, b> of real numbers in the plane, or an ordered triple <a, b, c> of real numbers in space. A vector has both magnitude and direction.

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