Ben brought 1/2 pound of cheese for 3 sandwiches. if he put the same amount of cheese on each sandwich, how much cheese will each sandwich have?

Ineed to know the rule for the sequence. plz !

Bobs burgers bam has a special deal of 4 hamburgers for $6. at that rate, how much should it cost to buy 3 hamburgers?

Griffin ordered a pair of sneakers online. he had a $22 credit that he applied toward the purchase, and then he used a credit card to pay for the rest of the cost. if the shoes cost $58, how much did griffin charge to his credit card when he bought the sneakers?