To get a B in math, Alexandria Pappas must average 80 on five tests. Scores on the first four tests were 83, 74, 84, and 77. What is the lowest score that she can get on the last test and still get a B?

What number should be added to the expression x^2+3x+ in order to create a perfect square trinomial? 3/2 3 9/4 9

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

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?