Question

The formula p=8n-30 gives the profit p when a number of items n are each sold at $8 and expenses totaling $30 are subtracted

a. If the profit is $170.00, how many items were bought
b. If the same number of items were bought but the expenses changed to $40, would the profit increase or decrease, and by how much

Answer 1

The profit here has decreased by $10. We can work this out through the following equation -
170= 8n-30= 200= 8nn=25B: P= 8(25) - 40= 200 - 40P= 160