7.1 Substitution

Today we learned basic algebra concepts. The one thing I didn't know was that when you have x(x-2)=0 you can just separate x and x-2 into two separate entities and solve each one individually. Also there are situations were there are no solutions. Also we learned how to gage profit and how to break even. The key equation is that total cost = total revenue in order to break even. One questions had was what the initial cost was and it is explained as the money needed in order to start or make the product.

 

This is a graph of break even and it illustrates how the cost is equal to the revenue when they are equal. Similarly, profit is made when cost<revenue. Money is lot when cost>revenue.