Acme Electric Company\'s monthly bill is the sum of a basic customer charge and

Question

Acme Electric Company's monthly bill is the sum of a basic customer charge and a usage charge (based on the amount of electricity supplied, measured in kilowatt hours). The basic customer charge is $9.30. The usage charge is $0.09 for each kilowatt hour of electricity supplied. Jenny is a customer who wants to keep her monthly bill at $120 or less. At most how many kilowatt hours of electricity can she use per month to meet this goal? Show work. Let x = number of kilowatt hours. Write an appropriate inequality involving x and solve it algebraically. Write a sentence to carefully state the answer to the question. The sentence should have the form "Jenny can use at most kilowatt hours per month,"

Explanation / Answer

cost< 120

9.3+0.09*x<120

0.09x<120-9.3

x<(120-9.3)/0.09
x<1230

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