Sandra runs at a rate of 8 miles in 45 minutes. how many miles can she run in 60 minutes?

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

What is the angle measure, or angle of depression, between this bird and the bird watcher?

(25 ! ) what does it mean for an equation to have no solution or infinitely many solutions?