Solve equation for solution

4=5x

Ten times the square of a non-zero number is eqaul to ninety times the number

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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?