Please help me with this ! i need to turn this asap !!! Graph the function f(x) =0.5x2− 2x− 2. Find the axis of symmetry, the vertex, and the y-intercept.

Worth 30 points! in this diagram, both polygons are regular. what is the value, in degrees, of the sum of the measures of angles abc and abd?

Three numbers x, y, and z are in the ratio 2: 7: 8. if 12 is subtracted from y, then three numbers form a geometric sequence (in the order x, y–12, z). find x, y, and z. there are 2 sets.

Charlie tosses five coins.what is the probability that all five coins will land tails up.