Does the following represent the substitution property? a triangle has three sides that measure 2 in, 3 in, and 4 in. to find the perimeter you would write: p = 2 + 3 + 4 since p = side 1 + side 2 + side 3

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?