To babysit one child, Fernando charges $10 to drive to the appointment plus $4 per hour. He saves 30% of the total amount he earns. Brenna charges $6 per hour and saves 25% of the total amount she earns. Which equation can be used to determine the number of hours, h, after which Fernando and Brenna will have saved the same amount of money? 10 + 0.3(4h) = 0.25(6h) 0.3(10) + 4h = 0.25(6h) 0.3(10 + 4h) = 0.25(6h) 0.3(14h) = 0.25(6h)

The equation which can be used to determine the number of hours, h, after which Fernando and Brenna will have saved the same amount of money is 0.3(10 + 4h) = 0.25(6h)

let

h = number of hours

$10 + $4h

30% of $0 + $4h

= 30/10(10 + 4h)

= 0.3(10 + 4h)

25% of $6h

= 25/100 × 6h

= 0.25(6h)

Equate both

0.3(10 + 4h) = 0.25(6h)

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0.3(10 + 4h) = 0.25(6h)

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