# Making linear equations out of word problems.

Not what you're looking for?

1. Assume that you do not know how many people from your contact list will call you this week. Let's call this number z.

a. What would this z be called in mathematics? A variable

b. If you know that on the week of your birthday you will get 2.3 times the number of calls as normal, write an expression that writes this in terms of z.

2.3z=x

c. If z is the number of calls you got in module 1, calculate the number of calls you will get during your birthday week. Assume you got 10 calls in module 1. Z = 1

2. Assume that every week after the week you counted your number of contacts you add another person to the list. Assuming 150 contacts.

a. Write an equation that will tell you how many people will be on your list in x number of weeks.

b. Figure out how many people will be on your list in 12 weeks.

c. Figure out how many weeks it will take to have 200 people on your list.

3. Draw a coordinate system. On the x-axis place time measured in number of weeks, and on the y-axis the number of people in your contact list.

a. Assume week 1 is the week when you originally counted the number of contacts. Draw a point on the coordinate system that corresponds to the number of contacts at week 1.

b. Draw another point that corresponds to the number of people you calculated would be on your list in 12 weeks.

c. Draw a line that represents the equation you wrote in 2.a. Does this line go through the 2 points you drew in part 3 a and b? Why or why not?

##### Purchase this Solution

##### Solution Summary

This solution provides step-by-step instructions for determining and graphing linear equations from word problems in 537 words.

###### Education

- BSc, University of Bucharest
- MSc, Ovidius
- MSc, Stony Brook
- PhD (IP), Stony Brook

###### Recent Feedback

- "Thank you "
- "Thank You Chris this draft really helped me understand correlation."
- "Thanks for the prompt return. Going into the last meeting tonight before submission. "
- "Thank you for your promptness and great work. This will serve as a great guideline to assist with the completion of our project."
- "Thanks for the product. It is an excellent guideline for the group. "

##### Purchase this Solution

##### Free BrainMass Quizzes

##### Solving quadratic inequalities

This quiz test you on how well you are familiar with solving quadratic inequalities.

##### Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.

##### Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

##### Probability Quiz

Some questions on probability

##### Geometry - Real Life Application Problems

Understanding of how geometry applies to in real-world contexts