Mr. Velazco made snacks in separate gift bags. He gave one each to the 636 sixth grade students going on the field trip. Then he gave 40 bags to the students in Mrs. Barker's class for decorating the trophy cases. Next he gave 20 to the students in Mrs. Crow's class for helping during the school play. Mr. Velazco had 7 snacks left. How many snacks did he make?

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?