How to solve 0.01x+0.07y=0.22 and 0.03x-0.05y=0.14 by substitution

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.)

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)

The perimeter of a rectangle is 42 inches. if the width of the rectangle is 6 inches, what is the length