I need help with question 9

Firefox File Edit View History Bookmarks Tools Window 90% . Thu 11:44:26 PM Q = . .. A HW 2.3 - Linear Models for Busin X C A Group Of Retailers Will Buy 80 X * Course Hero X A https://www.webassign.net/web/Student/Assignment-Responses/submit?dep=24037974 B ... U L I DOE Each additional unit sold increases the profit by this much. The profit is maximized when this many units are sold. 9. [-/0.47 Points] DETAILS 0/30 Submissions Used MY NOTES A company charting its profits notices that the relationship between the number of units sold, x, and the profit, P, is linear. If 170 units sold results in $1360 profit and 220 units sold results in $4260 profit, write the profit function for this company. P = Find the marginal profit. $ Need Help? Watch It Master It 10. [-/0.47 Points] DETAILS 0/30 Submissions Used MY NOTES Extreme Protection, Inc. manufactures helmets for skiing and snowboarding. The fixed costs for one model of helmet are $7100 per month. Materials and labor for each helmet of this model are $35, and the company sells this helmet to dealers for $65 each. (Let x represent the number of helmets sold. Let C, R, and P be measured in dollars.) (a) For this helmet, write the function for monthly total costs C(x). JUL 34 2 -A W 3P9