(x^2-y^2)/(x-y) whats the answer to this problem

Maria donates a fixed amount, a, to a charity each month. if she donates $300 in 12 months, what is the equation for a? a. a + 300 = 12 b. a × 300 = 12 c. a × 12 = 300 d. a + 12 = 300 e. a + 32 = 100

Ahiking trail is 6 miles long. it has 4 exercise stations, spaced evenly along the trail. what is the distance between each exercise station?

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?