Book Maths Puzzle Algebra

The new perking lot has spaces for 450 cars. the ratio of spaces for full-sized cars to compact cars is 11 to 4. How many spaces are for full-sized cars? How many spaces are for compact cars?

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Book Other Question

HOW MANY GRAMS OF PURE SALT MUST BE ADDED TO 40 GRAMS OF A 20% SALT SOLUTION TO MAKE A SOLUTION THAT IS 36% SALT? Suppose you are starting an office-claning service. You have spent $315 on equipment. To clean the office you use $4 worth of supplies. You charge $25. How many offices must you clean to break even?