Find the value of the given trigonometric function. cot (-690) degrees​

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2