7 is subtracted from the cube of a number

Graph y ≥ -x^2 - 1. click on the graph until the correct graph appears.

Does the point (1, sqrt 7) lie on circle shown.

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f