1- Mr. Shull wants to burn 500 calories in one workout. HE figures out that he can surf or lift weights. For every hour of surfing, Mr. Shull can burn 100 calories. For every hour of lifting weights, he can burn 75 calories. Mr. Shull wants to work out for a total of 6 hours. How many hours should he surf and lift weights to exactly meet his goals?

a- Carefully define your variables. What are x and y?

b-Write an equation representing the number of workout hours

c- Write an equation representing the number of calories burned.