PRACTICE EXAM
1. Fill in the blank by selecting the symbol below, which makes this statement true:
4
4
2 _
17 17
a) =
b) >
c) <
2. Simplify completely:
x 30
.
x 10
a) x 40
b) x 20
1
c) 40
x
1
d) 20
x
3. Rationalize the denominator:
5
3 1
a)
5( 3 + 1)
2
5(
Week 8
GE127
Evaluate the determinant
5 8
2 6
5 8
2 6
The determinant is found on page 873 in your text book.
We find determinants in the following way:
5 8
(5)(6)(2)(8)=30 2 6 16 We know that when we
subtract a negative it turns
into an addition s
Robert Jones
2/3/2013
Week 7 Assignment
Finding BreakEven Point
Tasks:
A company that manufactures bicycles has a fixed cost of $100,000. It costs $100 to produce
each bicycle. The selling price per bike is $300.
1. Write the cost function, C.
Cost equal
Week 7
GE127
Solve the system of equations:
3x7y=13
6x+5y=7
Addition Method:
Pg 752
1. 3x7y=13
2. 6x+5y=7
We start by deciding which variable to eliminate first. I
personally think the x variable looks easiest to eliminate first
because I can just multi
f g
If f(x)=5x3 and g(x)=3x+6
f g
This symbol is what we call a composite
function. You say this like, F of G. You plug
the g(x) function in for the x in the f(x)
function. Another way to look at this is: F(g(x)
If f(x)=5x3 and g(x)=3x+6
f =5(3x+6)3
g
Robert Jones
Interpreting a Functions Graph
Tasks:
Given the information on the graph, answer the following questions:
1. Explain why f represents the graph of a function.
a. The graph is a function, because (using the verticalline test) a vertical line
Robert Jones
GE127 Week 5 Assignment 1
For each line, use the given conditions to write an equation in the pointslope form and the slopeintercept
form.
1. Slope = 4, passing through (1, 3)
Pointslope form: y y1 = m(x x1)
y  3 = 4(x  1)
y  3 = 4x 4
Robert Jones
GE127 Week 5 Assignment 1
Determine whether each relation is a function. In addition, provide reasons for identifying a relation as a
function.
In a function, each element, in a domain, corresponds to exactly one element in the range. This me
GE127 Mathematics I
[email protected]
1. Write the equation of the line passing through (2,5) Slope 6
Point Slope Form:
Slope Intercept Form: y=mx+b
2. Write the equation of the line passing through (4,0) Slope 4
Point Slope Form:
Slope Intercept For
Week 4
GE127
Solve the inequality
4 x 7 19
4 x 7 19
We solve this just like we solve regular equations.
We start by subtracting 7 from both sides
4 x 12
And then we divide both sides by 4
x 3
Now the only rule that you have to remember for inequalities is
Robert Jones
GE127 Week 4 Assignment 2
Problem: You need to choose between two telephone plans for local calls. Plan A charges $25 per month
for unlimited calls. Plan B has a monthly fee of $13 with a charge of $0.06 per local call. How many local
telepho
Robert Jones
GE127 Week 4 Assignment 1
Problem: A truck can be rented from Basic Rental for $50 per day plus $0.20 per mile. Roadrunners
charges $20 per day plus $0.50 per mile to rent the same truck. How many miles must be driven in a day
to make the ren
The graph shows the average hourly earnings in dollars in the United States from January 1996
through January 2006.
1. According to this graph, what are the estimated lowest average earnings? In which year
were they the lowest?

The graph shows that the
Robert Jones
Week 3 Assignment 1
The graph below depicts the number of victims per 1,000 persons, age 12 years and over, in the
United States from 1973 through 2003.
1. According to this graph, what is the lowest violent crime rate? In which year was it t
Week 9
GE127
Convert to radians:
28
Convert 28 to radians:
Whenever we do conversions we always have whats called a conversion factor. We
multiply what we are converting by the conversion factor and it will convert our units.
Our conversion factor in this
Robert Jones
2/20/2013
Week 9 Assignment
Car Engine's Angular Speed
Tasks:
The engine of a sports car rotates at 5,000 revolutions per minute (rpm). Calculate the angular
speed of the engine in radians per second. Use 2p radians = 1 revolution.
We need to