Select the correct answer from the drop-down menu. john, johan, and jonathan collect postage stamps. johan and jonathan have the same number of stamps. two times johan’s collection is eleven less than five times john’s collection, and three times jonathan’s collection is three less than seven times john’s collection. the number of postage stamps in john’s collection is .

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?