SOLUTION: A city currently has 138 streetlights. As part of an urban renewal program, the city council has decided to install 3 additional streetlights at the end of each week for the next 5

Algebra ->  Test -> SOLUTION: A city currently has 138 streetlights. As part of an urban renewal program, the city council has decided to install 3 additional streetlights at the end of each week for the next 5      Log On


   

Question 1195602: A city currently has 138 streetlights. As part of an urban renewal program, the city council has decided to install 3 additional streetlights at the end of each week for the next 52 weeks. Use this information to complete the following statements. Round to the nearest whole number as needed.
The city will have___ streetlights at the end of 25 weeks.
The city will have 282 streetlights at the end of ___ weeks.
Found 2 solutions by greenestamps, Alan3354:
Answer by greenestamps(13195) About Me  (Show Source):
You can put this solution on YOUR website!


The number of streetlights is currently 138; 3 more are being added each week; the number of streetlights after n weeks is given by

f%28n%29=138%2B3n.

(1) Number of streetlights after 25 weeks -- evaluate the function for n=25:
f%2825%29=138%2B3%2825%29
Evaluate....

(2) Number of weeks after which there will be 282 streetlights -- find the value of n for which the function value is 282:
f%28n%29=138%2B3n=282
138%2B3n=282
3n=282-138
3n=144
you can finish....

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
A city currently has 138 streetlights.
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A city has 138 streetlights.
"currently" is not needed.