Respuesta :
In 5 weeks, Brian have done 445 sit-ups and Christina have done 425 sit-ups
How to calculate the total number of sit-ups done by each person in 5 weeks from the statement ?
Given, Brian did 85 sit-ups first week and 90 sit-ups each week after that.
Thus in first week, sit-ups by Brian is 85 and for next four weeks is 4*90 = 360 sit-ups.
∴ Total sit-ups done by Brian in 5 weeks is = 85 + 360 = 445 sit-ups.
Also given, Christina did 65 sit-ups the first week and 90 sit-ups each week after that.
Thus in first week, sit-ups by Christina is 65 and for next four weeks is 4*90 = 360 sit-ups.
∴ Total sit-ups done by Christina in 5 weeks is = 65 + 360 = 425 sit-ups.
Therefore we have Brian doing 445 sit-ups and Christina doing 425 sit-ups in 5 weeks.
To learn more about statement problem solution, refer -
https://brainly.com/question/18648288
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