A mixture of purple paint contains 6 teaspoons of red paint and 15 teaspoons of blue paint. To make 63 teaspoons of purple paint, how much blue paint would we need? A. 12 tsp
B. 18 tsp
C. 30 tsp
D. 45 tsp

One-third of the people from country a claim that they are from country b, and the rest admit they are from country a. one-fourth of the people from country claim that they are from country a, and the rest admit they are from country b. in a combined census of the two countries, one-half of the total claimed to be from a. what is the ratio of the populations of country a to that of country b.

Me! 50 points! why does when we come home, our door is unlocked and there is grease on the door knob, me solve this , and i don't know what category this goes under

Which expression is equivalent to the expression shown?