Which equations can be used to determine the area of the irregular figure? check all that apply.

a= 3(5) + 1/2(5)(6)
a= 1/2(5)(9) + 1/2(3)(5)
a= 1/2(3)(5)(9)
a= 3(5)(9)
a= 1/2(5)(9) + 3(5)
a= 3(5) + 6(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.

Angela is buying a dress that is on sale for 20% off. if the original price of the dress is $40.00, how much money is angela saving on the dress? a. $0.80 b. $3.20 c. $32.00 d. $8.00

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500