tres amigos reúnen su dinero para realizar una compra. Guille tiene $50 mas de lo que tiene daiana. Fede tiene un quinto del dinero de guille y diana juntos . si en total tienen $600, ¿cuanto dinero aporta cada uno?

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

What are the solutions of the system? solve by graphing. y = -x^2 -6x - 7 y = 2

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2