The ratio of red to blue to green marbles in a jar is 4 to 5 to 3. If the jar has 48 marbles, how many marbles are blue?

Given that de, df, and ef are midsegments of △abc, and de=3.2 feet, ef=4 feet, and df=2.4 feet, the perimeter of △abc is .

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

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