Need help with number 3 and 4. Please help worth 77 points!!
Accepted Solution
A:
Let X = cost per pound and Y be the base price.Total cost would equal base price plus weight cost = T = Y +XFor the 3 pound package the price would be the base price plus 3 times the price per pound: y + 3xNow you have 22.85 = y +3xFor the 10 pound package you have 40 = Y + 10xRewrite the second equation as y = 40-10xReplace Y in the first equation:22.85 = 40-10x + 3xSimplify:22.85 = 40 - 7xSubtract 40 from both sides:-17.15 = -7xDivide both sides by -7:x = -17.15 / -7x = 2.45The cost per pound is $2.45Now you can find base price:22.85 = Y +3(2.45)22.85 = y + 7.35y = 22.85 - 7.35y = $15.50Answer for #3:Total cost = 15.50 + 2.45X ( X = the weight of the package).Answer for #4Total = 15.50 + 2.45(15)Total = 15.50 + 36.75Total = $52.25