During the past week, Mr. Hamilton gave one quiz and one exam to his high school algebra class. It takes Mr. Hamilton 1/15

!" of an hour to grade one student’s exam and 1/30

!" of an hour to grade one
student’s quiz. If x represents the number of students that took the quiz and exam, which
equation below could be used to find the y, the total amount of time, in hours, spent grading?

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?