# Discussion board

Hi I have submit tow discussion board also, I have submitted student reply please I need a short comment for it

Discussion 1

Describe a real-life situation in which you may want to solve a system of linear equations. What do the y-intercepts represent in your example? What does the solution (or intersection) represent in your example?

Student replay

Relation between two variables is described by linear equation. A real life example of linear equation is renting a car. Let rent for a car is \$10 per day and \$0.20 per mile it travelled. This scenario can be described with the help of a linear equation. A linear equation is generally represented as y = mx + c, where m is the slope and c is y-intercept. In the example above, y-intercept is 10 and slope is 0.20. Setting up the equation, y = 0.20x + 10 where x represents number of miles travelled. So if 10 miles are covered the total expense will be y = 0.20(10) + 10. This will result y = \$12. So, this is the total expenditure of the trip.

Discussion 2

Will the sum or difference of two radical expressions always yield a radical expression? Will the product or quotient of two radical expressions always yield a radical expression? Explain.