Recycled cds, incorporated, offers a choice of 5 used cds for $28, with each additional cd costing $5. write a cost function for purchasing 5 or more cds. what will the cost of buying 9 cds be? let x represent the number of cds over 5.

and

Step-by-step explanation:

Given: Recycled CDs, Incorporated, offers a choice of 5 used CDs for $28, with each additional CD costing $5

To Find: cost function for purchasing 5 or more CDs, the cost of buying 9 CDs, Let x represent the number of CDs over 5.

Solution:

Cost of buying 5 used CDs

Cost of additional CD

now,

number of CDs over

cost function for purchasing or more CDs =

Now,

Cost of buying CDs

one will buy additional CDs

Hence, cost function for purchasing 5 or more CD is  , and cost of buying CD is  

the answer is b. 60. each interior angle in 120, so the exterior angle must be 60 in order to add up to 180

step-by-step explanation:

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step-by-step explanation:

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