Please answer this now in two minutes

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

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

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?