 (Back
to the practice test on tutorials 11 - 18)
Beginning Algebra
Answer/Discussion to Practice
Test
| Problems 1a - 1b: Simplify the expressions. |
| Problem 2a: Write the phrase as an algebraic expression and
simplify if possible. |
| 2a. The sum of 8 times a number and 4 subtracted from 16 times
a number.
 Answer:
|
| Problems 3a - 3c: Solve the given equation. |
| Problems 4a - 4f: Solve the following word problems. |
| 4a The product of 5 and a number is 8 less than 7 times that
number.
Answer:
Let x = the number
The number is 4. |
4b. Complimentary angles sum up to be 90 degrees. Find
the measure of each angle in the figure below. Note that since the
angles make up a right angle, they are complementary to each other.
Answer:
The angles are 34 degrees and 56 degree. |
| 4c. 14.4 is what percent of 60?
Answer:
Let x = the percent
x is 24%. |
| 4d. You are wanting to buy a stereo system that costs $325
plus tax. If you are going to be taxed 8.25%, how much will be the
final cost of the stereo system? (round to the nearest cent)
Answer:
Let x = final cost
The final cost would be $351.81. |
| 4e. You are traveling down I-40 at a constant speed of 70 mph.
How many hours will it take you to travel 385 miles?
Answer:
Let t = the number
of hours
It would take 5.5 hours. |
| 4f. A total of $1000 is deposited into two simple interest
accounts. On one account the annual simple interest rate is 5% and
on the second account the annual simple interest rate is 7%. The
amount of interest earned for 1 year was $64. How much is invested
in each account?
Answer:
x = amount in 5%
1000 - x = amount
in 7%
Deposited $300 at 5% and $700 at 7%. |
| Problems 5a - 5c: Solve the inequality and graph the solution
set. |
All contents copyright (C) 2001 - 2008, WTAMU and Kim Seward. All rights reserved.
Last revised on Jan. 9, 2002 by Kim Seward. |
