SOLUTION: Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administ

Question 124495:
Biologists want to set up a station to test alligators in the lake for West Nile Virus. Suppose that the costs for such a station are $2,500 for setup costs and $3.00 to administer each test.
Write an expression that gives the total cost totest x animals.
You can find the average cost per animal by dividing total costs by number of animals. Write the expression that gives the average cost per animal.
Find the average cost per animal for 10 animals, 100 animals. 1,000 animals.

Answer by checkley71(8403) (Show Source): You can put this solution on YOUR website!
2,500+3x=cost to text x animals.
(2,500+3x)/x=average cost to test x animals.
(2,500+3*10)/10
(2,500+30)/10
2,530/10=$253 average costto test 10 animals.
(2,500+3*100)/100
(2,500+300)/100
2,800/100=$28 average cost for 100 animals.
(2,500+3*1,000)/1,000
(2,500+3,000)/1,000
5,500/1000=$5.50 average cost for 1,000 animals.
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