In the following exercises, translate to a system of inequalities and solve.
325. Mark is increasing his exercise routine by running and walking at least 4 miles each day. His goal is to burn a minimum of 1500 calories from this exercise. Walking burns 270 calories/mile and running burns 650 calories.
(a) Write a system of inequalities to model this situation.
(b) Graph the system.
(c) Could he meet his goal by walking 3 miles and running 1 mile?
(d) Could he his goal by walking 2 miles and running 2 mile
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