You follow the order of operations, so first the two, so it would be -7+2x-6 then add -7 and -6, which equals to -13. Put the x first, so your answer would be 2x-13 so D
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