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Solutions for Chapter 4.7: Precalculus 5th Edition
Full solutions for Precalculus  5th Edition
ISBN: 9780321837349
Solutions for Chapter 4.7
Get Full SolutionsPrecalculus was written by and is associated to the ISBN: 9780321837349. Chapter 4.7 includes 21 full stepbystep solutions. Since 21 problems in chapter 4.7 have been answered, more than 11740 students have viewed full stepbystep solutions from this chapter. This expansive textbook survival guide covers the following chapters and their solutions. This textbook survival guide was created for the textbook: Precalculus, edition: 5.

Acute triangle
A triangle in which all angles measure less than 90°

Blocking
A feature of some experimental designs that controls for potential differences between subject groups by applying treatments randomly within homogeneous blocks of subjects

Categorical variable
In statistics, a nonnumerical variable such as gender or hair color. Numerical variables like zip codes, in which the numbers have no quantitative significance, are also considered to be categorical.

Causation
A relationship between two variables in which the values of the response variable are directly affected by the values of the explanatory variable

Combinatorics
A branch of mathematics related to determining the number of elements of a set or the number of ways objects can be arranged or combined

Continuous function
A function that is continuous on its entire domain

Equilibrium point
A point where the supply curve and demand curve intersect. The corresponding price is the equilibrium price.

Heron’s formula
The area of ¢ABC with semiperimeter s is given by 2s1s  a21s  b21s  c2.

Hyperbola
A set of points in a plane, the absolute value of the difference of whose distances from two fixed points (the foci) is a constant.

Integers
The numbers . . ., 3, 2, 1, 0,1,2,...2

Interval
Connected subset of the real number line with at least two points, p. 4.

LRAM
A Riemann sum approximation of the area under a curve ƒ(x) from x = a to x = b using x1 as the lefthand endpoint of each subinterval

Multiplicative inverse of a complex number
The reciprocal of a + bi, or 1 a + bi = a a2 + b2 ba2 + b2 i

Origin
The number zero on a number line, or the point where the x and yaxes cross in the Cartesian coordinate system, or the point where the x, y, and zaxes cross in Cartesian threedimensional space

Quotient of functions
a ƒ g b(x) = ƒ(x) g(x) , g(x) ? 0

Remainder polynomial
See Division algorithm for polynomials.

Scalar
A real number.

Seconddegree equation in two variables
Ax 2 + Bxy + Cy2 + Dx + Ey + F = 0, where A, B, and C are not all zero.

Triangular form
A special form for a system of linear equations that facilitates finding the solution.

Vertex form for a quadratic function
ƒ(x) = a(x  h)2 + k