Please assist in answering this question​

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

Which of the following describes the symmetry of the graph of y = x3?

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?