how many coupons did we each earn just for arriving at Castel Sant' Angelo? This represents the initial value of the stuation

Which of the following system of equation is not equal to the system of equations is not equal to the system of equations shown below

What is the equation of the graph below? y=sec(x)-4

Which formula finds the probability that a point on the grid below will be in the blue area? p(blue) = total number of squares number of blue squares number of blue squares p(blue) = total number of squares number of blue squares p(blue) = number of white squares