Analyze the key features of the graphs of the functions below. select all of the quadratic functions that open down, have a vertex that is a maximum and a positive y-intercept. f(x) = 2x2 - 4x - 3 g(x) = - x2 + x + 1 h(x) = -2x2 + 3x - 1 m(x) = x2 -9 n(x) = -3x2 + 7

f(x) = 2x^2 - 4x - 3; opens up; vertex: (1, -5); y-intercept: (0, -3)

g(x) = -x^2 + x + 1; opens down; vertex: (0.5, 1.25); y-intercept: (0, 1)

h(x) = -2x^2 + 3x - 1; opens down; vertex: (0.75, 0.125); y-intercept: (0, -1)

m(x) = x^2 - 9; opens up; vertex: (0, -9); y-intercept: (0, -9)

n(x) = -3x^2 + 7; opens down; vertex: (0, 7); y-intercept: (0, 7)

I have attached an image of the functions and their graphs.

Hope this helps!

answer: a. 74

step-by-step explanation:

it shows divided evenly, so add the 37+37 = 74

b 1: 45 am

step-by-step explanation:

its that because if it was in the pm it would be 1345