Jennifer has a $20 bill to buy school supplies. she wants to buy 4 notebooks that cost $2.55 each and 3 cases of pencils that cost $1.99 each. how much change will she get back after she pays for the items? a. $3.83 b. $5.97 c. $10.20 d. $16.17

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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.)

The length of a rectangular piece of land is 92 yards more than three times its width. the perimeter is 760 yards. find its dimensions.