Apply the Idea 15. Kuan installs smoke and carbon monoxide detectors in
14;
apartment buildings. He charges + dollars for each smoke.
detector and n dollars for each carbon monoxide detector. In
one building, he installed 12 smoke detectors and 9 carbon 2 +1.5
monoxide detectors. In another building, he installed 15
smoke detectors and 7 carbon monoxide detectors.
a. Write variable expressions for the amount Kuam charges
for the detectors installed in each building. hbe vor ad
b. Add the expressions to find the total amount he charged
for the detectors.
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