Question

Sara worked 22 hours last week. Joan worked 4 hours less than Sara, and Erin worked half as many hours as Joan. How many hours did Sara, Joan, and Erin work last week?

Answer 1

SO basically Sara worked for 22 hours and Joan worked for 18 hours and Erin worked for only 9 hours. 22 + 18 + 9 = 49 hours in total.

Answer 2

Answer:

• Sara worked 22 hours
• Joan worked 18 hours
• Erin worked 9 hours
• The three of them worked 49 hours in total

Explanation:

You may set a numerical equation by translating the word statements into arithmetic expressions in this way:

1) Sara worked 22 hours last week: 22

2) Joan worked 4 hours less than Sara: 22 - 4

3) Erin worked half as many hours as Joan: [22 - 4] / 2

4) How many hours did Sara, Joan, and Erin work last week? : add up every arithmetic expression:

• 22 + (22 - 4) + (22 - 4) / 2

5) Simplify doing the operations:

• 22 + (22 - 4) + (22 - 4) / 2 = 22 + 18 + 18/2 = 22 + 18 + 9 = 49

Conclusion:

• Sara worked 22 hours
• Joan worked 18 hours
• Erin worked 9 hours
• The three of them worked 49 hours in total.