Direct variation equation if f(x) varies directly with x and f(x)=-18 when x=3

Adoctor administers a drug to a 38-kg patient, using a dosage formula of 50 mg/kg/day. assume that the drug is available in a 100 mg per 5 ml suspension or in 500 mg tablets. a. how many tablets should a 38-kg patient take every four hours? b. the suspension with a drop factor of 10 ggt/ml delivers the drug intravenously to the patient over a twelve-hour period. what flow rate should be used in units of ggt/hr? a. the patient should take nothing pills every four hours. (type an integer or decimal rounded to the nearest hundredth as needed.)

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.