If f(x) = 11x + 8 find f(0)

Which values for a and b will create infinitely many solutions for this system of equations? ax-y=8 2x+y=b

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.