Question

Jessica electricity bill costs $32.44 per month plus $1.34 per kilowatt hour. how many kilowatt hours can she use and keep her bill to no more than $87? enter as a whole number

Answer 1

Explanation:

We are looking for the maximum number of kilowatt hours that Jessica can use per month. Let n represent the number of kilowatt hours. We are given that the electricity bill costs $32.44 plus $1.34 per kilowatt hour and that Jessica wants to spend less than $87, so that

$32.44 plus $1.34 times the number of kilowatt hours is less than or equal to $87.

Translate this into an inequality and solve for n to find

32.44+1.34n <= 87

1.34n<=54.56

n<=40.72

Since the number of kilowatt hours must be a whole number, we conclude that Jessica can use a maximum of 40 kilowatt hours.

so 40 is the correct answer

Answer 2

Jessica can use no more than 40 kilowatt hours.

To check this, we're going to start by subtracting the bill from 87 dollars.

`87 - 32.44`
This equals 54.56 dollars.

You then solve how many hours she can use by dividing.

`32.44 / 1.34`
You get a really big answer like 40.7164... since it needs to be a whole number and not a fraction of a number, round down.