Homework Help: Math

Posted by Anonymous on Thursday, January 27, 2011 at 5:28pm.

Imagine you are in the market for a new home and are interested in a new housing community under construction in a different city.
The sales representative informs you that there are 56 houses for sale with two floor plans still available. Use x to represent floor plan one and y to represent floor plan two. Write an equation that illustrates the situation.
X + Y = 56

The sales representative later indicates that there are three times as many homes available with the second floor plan than the first. Write an equation that illustrates this situation. Use the same variables you used in Part a.

Use the equations from Parts a. and b. of this exercise as a system of equations. Use substitution to determine how many of each type of floor plan is available. Describe the steps you used to solve the problem.

What are the intercepts of the equation from Part a. of this problem? What are the intercepts from Part b. of this problem? Where would the lines intersect if you solved the system by graphing?

Math - Michael, Saturday, May 21, 2011 at 5:58pm
b. The representative tells you that floor plan one sells for $175,000 and floor plan two sells for $200,000. She also mentions that all the available houses combined are worth $7,200,000. Write an equation that illustrates this situation. Use the same variables you used in Part a.

c. Use elimination to determine how many houses are available in each floor plan. Explain how you arrived at your answer. I started multiplying the first equation by this eliminates one variable. However, I solved the remaining variable and substitute it into the first equation to find the second variable.

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