Pretest #2 - Sections 6.1-7.1
1. a) Find the domain of the
function: 
(5 points)
b) Write in lowest terms: 
(5 points)
2) Multiply or divide. Write
your answers in lowest terms (6 points each)
a) 
b) 
3) Add or subtract. Write
your answers in lowest terms (6 points each).
a) 
b) 
4) Simplify. Write your
answers in lowest terms (6 points each).
a) 
b) 
5) Solve the equations (6
points each).
a) 
for 
b) 
c) 
6) Do at least two of the
following word problems. The best two out of three will count 8 points each.
You must show an algebraic solution to receive credit.
a) Sue can mow a lawn by
herself in 3 hours and
b) Train A has a speed of 20
miles per hour greater than that of train B. If train A travels 240 miles in
the same time train B travels 200 miles, what are the speeds of the two trains?
c) The difference of the
reciprocal and the reciprocal of two more than the number is 1/24. Find the
number(s).
7) The simple interest for a
certain savings account is jointly proportional to the time and principal. If
after 2 years the interest on a principal of $5000 is $275, find the interest
on a principal of $2500 after 5 years (10 points).
8) Evaluate (2 points each).
a) 
b) 
c) 
d) 
e) 
Answers
1a) x can't equal 4 or -3/2 1b) 
2a) 
2b) 
3a) 
3b) 
4a) 
4b) 
5a) 
5b) x = 35
5c) x = 0
6a) 12/7 hours 6b) Train A: 120 mph, Train B: 100 mph 6c) -8 and 6
7. $343.75
8a) | x +1 | 8b) 11/6 8c)
not a real number 8d) -10 8e) -5