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CLOTHING A online retailer is running a special on jeans. All pairs of jeans are $39. The function f(x) = 39x models the total cost of buying x pairs of jeans. The retailer also charges $6 flat rate shipping fee. a. Write a function g(x) that represents the cost of purchasing jeans and having them shipped. b. Find the cost of purchasing 3 pairs of jeans before and after shipping

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Answer:

a. g(x) = 39x + 6

b. The price before shipping is $117 and the price after shipping is $123

Step-by-step explanation:

To represent the cost of purchasing jeans and shipping them, add 6 to the function, since it is a flat rate.

So, the function will be g(x) = 39x + 6.

Then, use this function to find the cost of 3 pairs of jeans after shipping:

g(x) = 39x + 6

g(3) = 39(3) + 6

g(3) = 117 + 6

= $123

Then, use the original function, f(x) = 39x, to find the price before shipping:

f(x) = 39x

f(3) = 39(3)

= $117

So, the price before shipping is $117 and the price after shipping is $123

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