20/4 = X/18 What is X

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

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