Beginning Algebra Tutorial 19


Beginning Algebra
Answer/Discussion to Practice Problems  
Tutorial 19: Practice Test on Tutorials 11 - 18


WTAMU > Virtual Math Lab > Beginning Algebra > Tutorial 19: Practice Test on Tutorials 11 - 18

 

 

Problems 1a - 1b:  Simplify the expressions.

 
1a. problem 1a

checkAnswer:

ad1a
 

1b. problem 1b

checkAnswer:

ad1b
 
 

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.

checkAnswer:

ad2a
 
 

Problems 3a - 3c:  Solve the given equation.

 
3a. problem 3a

checkAnswer:

ad3a
 

3b. problem 3b

checkAnswer:

ad3b
 

3c. problem 3c

checkAnswer:

ad3c
 
 

Problems 4a - 4f:  Solve the following word problems.

 
4a  The product of 5 and a number is 8 less than 7 times that number.

checkAnswer:

Let x = the number

ad4a

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. 
 
 

problem 4b

checkAnswer:

ad4b

The angles are 34 degrees and 56 degree.
 

4c.   14.4 is what percent of 60? 

checkAnswer:

Let x = the percent

ad4c

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)

checkAnswer:

Let x = final cost

ad4d

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?

checkAnswer:

Let t = the number of hours

ad4e

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?

checkAnswer:

x = amount in 5%
1000 - x = amount in 7%
 

ad4f
 

Deposited $300 at 5% and $700 at 7%.
 
 

Problems 5a - 5c:  Solve the inequality and graph the solution set.

 
5a. problem 5a

checkAnswer:

ad5a

ad5a
 

5b. problem 5b

checkAnswer:

ad5b

ad5b2
 

5c. problem 5c

checkAnswer:

ad5c

ad5c2
 

 

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WTAMU > Virtual Math Lab >Beginning Algebra > Tutorial 19: Practice Test on Tutorials 11 - 18


Last revised on July 28, 2011 by Kim Seward.
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