Can you guys please help me out

Jordan has $5.37, which he is using to buy ingredients to make salsa. he is buying one red pepper for $1.29 and three pounds of tomatoes. if jordan has exactly the right amount of money he needs, what is the price per pound of the tomatoes? choose the correct equation to represent this real-world problem. solve the equation and verify the reasonableness of your answer. a pound of tomatoes costs .

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount