Pls I need help it’s really important

If sin(x) = 0 and cos(x) = 1, what is tan(x)?

Janet is rolling a number cube with the numbers one through six she record the numbers after each row if she rolls of keep 48 times how many times should she expect to roll a 4

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab