Cost You need a total of 50 pounds of two commoditiescosting $1.25 and $2.75 per pound.(a) Verify that the total cost is y = 1.25x + 2.75(50 − x),where x is the number of pounds of the less expensivecommodity.(b) Find the inverse function of the cost function. What doeseach variablerepresent in the inverse function?(c) What is the domain of the inverse function? Validate orexplain your answer using the context of the problem.(d) Determine the number of pounds of the less expensivecommodity purchased when the total cost is $73.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
Cost You need a total of 50 pounds of two commodities
costing $1.25 and $2.75 per pound.
(a) Verify that the total cost is y = 1.25x + 2.75(50 − x),
where x is the number of pounds of the less expensive
commodity.
(b) Find the inverse function of the cost function. What does
each variable
represent in the inverse function?
(c) What is the domain of the inverse function? Validate or
explain your answer using the context of the problem.
(d) Determine the number of pounds of the less expensive
commodity purchased when the total cost is $73.
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