- 7.2.12: Solve each system in Exercises 1213. c2x - y + z = 13x - 3y + 4z = ...
- 7.2.13: Solve each system in Exercises 1213. cx + 2y - z = 52x - y + 3z = 0...
- 7.2.14: Find the quadratic function y = ax2 + bx + c whose graph passes thr...
- 7.2.15: The greatest cause of death in the 20th century was disease, killin...
Solutions for Chapter 7.2: Precalculus 5th Edition
Full solutions for Precalculus | 5th Edition
Angle between vectors
The angle formed by two nonzero vectors sharing a common initial point
Interest compounded using the formula A = Pert
The function y = cos x
A procedure for fitting an exponential function to a set of data.
First-degree equation in x , y, and z
An equation that can be written in the form.
The graph of a quadratic function, or the set of points in a plane that are equidistant from a fixed point (the focus) and a fixed line (the directrix).
A relationship between two variables in which higher values of one variable are generally associated with higher values of the other variable, p. 717.
Probability of an event in a finite sample space of equally likely outcomes
The number of outcomes in the event divided by the number of outcomes in the sample space.
Product rule of logarithms
ogb 1RS2 = logb R + logb S, R > 0, S > 0,
Any one of the four parts into which a plane is divided by the perpendicular coordinate axes.
Rational zeros theorem
A procedure for finding the possible rational zeros of a polynomial.
Reflection across the y-axis
x, y and (-x,y) are reflections of each other across the y-axis.
A variable that is affected by an explanatory variable.
A plot of all the ordered pairs of a two-variable data set on a coordinate plane.
Secant line of ƒ
A line joining two points of the graph of ƒ.
Symmetric difference quotient of ƒ at a
ƒ(x + h) - ƒ(x - h) 2h
See Horizontal translation, Vertical translation.
Upper bound test for real zeros
A test for finding an upper bound for the real zeros of a polynomial.
A letter that represents an unspecified number.
A shift of a graph up or down.