What is de answer of this problem 2(4z-2x+y)-4(5z+x-y)

Three coins are flipped. what is the probability that there will be at least two tails?

Select a graph that have an equation with a < 0

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126