Pls help i'm so close to being done / What ratio of people did not have a cold?

Which of the following is most likely the next step in the series? a3z, b6y, c9x, d12w, е15v, f18u

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

The function y= x - 4x+ 5 approximates the height, y, of a bird, and its horizontal distance, x, as it flies from one fence post to another. all distances are in feet. complete the square to find and interpret the extreme value (vertex). select two answers: one extreme value and one interpretation.