Evelyn is working two summer jobs, making $18 per hour lifeguarding and making $11 per hour tutoring. In a given week, she can work a maximum of 15 total hours and must earn no less than $200. If Evelyn worked 8 hours lifeguarding, determine the maximum number of whole hours tutoring that she can work and still meet her requirements. If there are no possible solutions, submit an empty answer.

Evelyn can work a maximum of hours tutoring.

Step-by-step explanation:

Evelyn earns per hour lifeguarding and she worked hours lifeguarding.

So, total money earned by lifeguarding .

She must earn no less than .

So, money left to earn .

Evelyn worked hours lifeguarding. She can work a maximum of total hours. So, she can work hours.

Evelyn earns per hour tutoring.

So, total money earned by tutoring .

Therefore, the total money earned .

Hence, Evelyn can work a maximum of hours tutoring.

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this