Mr waters' friend keeps a ratio of 12 cows to 4 pigs on his farm. if he has 39 cows, then how many pigs will he have?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

What is the value of x when x + 7 = 21?

The number of calories you burn depends on your weight. a 110-pound person burns 163 calories during 30 minutes of tennis. find the number of calories that a 190-pound person would burn during the same activity, assuming they burn calories at the same rate.