3. In a California study, Dean Lester Breslow and Dr. James Enstrom of the University of California at Los Angeles' School of Public Health concluded that the following 7 simple health rules a man's life can be extended by eleven years on the average and a woman's life by seven. These 7 rules are: no smoking, regular exercise, use alcohol moderately, get seven to eight hours of sleep, maintain proper weight, eat breakfast, and do not eat between meals. In how many ways can a person adopt 5 of these rules to follow a) if the person presently violates all 7 rules b) if the person never drinks and always eats breakfast?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.