A college student completed some corses worth 3 credits and some courses worth 4 credits. The student earned a total of 59 credits after completing 18 courses How many courses worth 3 credits did the student complete?

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

Eileen purchased 3.4 pounds of apples at the total cost of $19.72. if she purchases 6.2 pounds of apples at this store, how much would it cost?

Which of the following expressions is equal to 2x^2+8