week 8 review
Write the following set in builder notation form
y = x +
y = x
y = x
y = x +
Determine whether the system of linear equations has one and only one solution, infinitely many solutions, or no solution. Find all solutions whenever they exist.
one and only one solution
one and only one solution
one and only one solution
infinitely many solutions
Indicate whether the matrix is in row reduced form.
In a poll conducted among 180 active investors, it was found that 100 use discount brokers, 122 use full service brokers, and 54 use both discount and full service brokers. How many investors use only discount brokers?
Metro Department Store’s annual sales (in millions of dollars) during 5 years were
Plot the annual sales (y) versus the year (x) and draw a straight line L through the points corresponding to the first and fifth years and derive an equation of the line L.
The following breakdown of a total of 18,686 transportation fatalities that occured in 2007 was obtained from records compiled by the U.S. Department of Transportation (DOT).
What is the probability that a victim randomly selected from this list of transportation fatalities for 2007 died in a train or a plane accident? Round answer to two decimal places.
Use Venn diagrams to illustrate the statement.

Solve the linear programming problem by the simplex method.
Write the equation in the slope intercept form and then find the slope and y intercept of the corresponding line.
Maximize
P= 10x + 12y
subject to
If a merchant deposits $1,500 annually at the end of each tax year in an IRA account paying interest at the rate of 10%/year compounded annually, how much will she have in her account at the end of 25 years? Round your answer to two decimal places.
An experiment consists of tossing a coin, rolling a die, and observing the outcomes. Describe the event “A head is tossed and an odd number is rolled.”
