MATH UNIT 3
This Discussion topic has multiple parts. Please read and give a thorough response to each part.
Original Post
1. Write and post a real world word problem that can be solved using a linear equation in one variable. All of the information necessary to solve the equation must be included in your problem. For examples of such problems, see Exercises 2948 in Section 6.4 on pages 318 and 319 of your textbook. Feel free to use one of these problems as a model, but you must change names, numbers, details, etc. to make the problem your own…
2. Use the Procedure To Solve a Word Problem given in Section 6.4 on page 315 of your textbook to write a complete solution to your problem. You only need to complete steps 1 through 6. You do not need to check your solution. See Example 1 on page 315 and use it as a guide.
Note: there is a very helpful example in Doc Sharing on how to take an example and build a similar one to it to use in your post.
Example: A rug cleaning service charges a flat fee of $35.00 and a per room fee of $28.00. If the Morgan’s bill was $175 before taxes, how many rooms did they have cleaned?
You are being asked to find the number of rooms that were cleaned.
Let r = the number of rooms being cleaned.
If r is the number of rooms being cleaned, then $28.00r would be the cost of cleaning r rooms.
Flat fee + cost of cleaning r rooms = total bill
$35 + $28r = $175
Now solve the equation.
35 + 28r = 175
35 – 35 + 28r = 175 – 35
28r = 140
r = 5
Since r is the number of rooms that were cleaned, you know that the Morgan’s had the rugs in 5 rooms cleaned.
First Response to a Classmate
3. Find a classmate’s problem and solution that has NOT already been checked by a classmate. Show all steps in your check and explain each step as you go. Example 1 on page 315 is one example of a thorough check. If the classmate’s equation does not check, tactfully let the classmate know.
Example: The total bill is the flat fee plus the per room charge. Total bill = flat fee + per room charge
……. = $35 + $28(5)
……. = 35 + 140
……. = $175
The solution to the problem checks.
Second Response to a Classmate
4. Find at least one other post to comment on. Make sure your comments are substantive and advance the Discussion. Do not check a second classmate’s equation. Each of your classmates will also need to check a problem. You can look for opportunities to help another student, give advice on solving a problem a different way, or offer any other substantive comment.
STUDENT 1

STUDENT 2
Flea Market Candles by Barbara
Barbara is selling homemaid candles at the local flea market. Determine the cost of a Jar candle before tax if the total cost is $16.50, including a 10% tax.
Let C=cost of the candle before tax
Then 0.10=10% of the cost before tax
Cost of the candle before tax + tax on the candle=16.50
c+0.10c=16.50
1.10c=16.50
1.10/1.10c=16.50/1.10
c=15.00
Therefore the candle cost 15.00 before sales tax.