How do you solve linear systems by using substitution?

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

Which function can be used to model the monthly profit for x trinkets produced? f(x) = –4(x – 50)(x – 250) f(x) = (x – 50)(x – 250) f(x) = 28(x + 50)(x + 250) f(x) = (x + 50)(x + 250)

Graph the following system of linear inequalities. identify at least two points in the solution: y < 5 - 2x | x + 5y > -7