Awhile back, either james borrowed $12 from his friend rita or she borrowed $12 from him, but he can’t quite remember which. either way, he is planning to pay her back or ask that she pay him back this afternoon. if he has $42.80 in his wallet, which equation represents the amounts of money he may have after he sees rita?

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?