From a sample of 50 students, it is found that 39 are taking Algebra, 16 are taking Physics, and 7 are enrolled in both. How many students are enrolled in either Algebra or Physics?

Alawn mower manufacturer incurs a total of 34,816 in overhead costs and 388 per lawn mower in production costs. how many lawn mowers were manufactured if the average cost of productions is 660

The serenity and the mystic are sail boats. the serenity and the mystic start at the same point and travel away from each other in opposite directions. the serenity travels at 16 mph and the mystic travels at 19 mph. how far apart will they be in 3 hours?

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2