A bus travels two different routes: the Green Route and the Blue Route. The routes are different lengths. -On Monday the bus traveled the Green Route 6 times and the Blue Route 5 times, traveling a total of 52 miles.

-On Tuesday the bus traveled the Green Route 12 times and the Blue Route 13 times, traveling a total of 119 miles.

What is the length of the Green Route in miles?

answers:
a. 4.4 mi
b. 4.5 mi
c. 6.4 mi
d. 6.8 mi

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?