Write the question and the number so i know which one

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

What does x = in this equation x+3+2x=x+5