Mr. chavez spent $199.99 for a new smart phone, $39.99 on a carrying case, and $59.99 on on accessories. the expression (-199.99) + (-59.99) represents the total amount that mr. chavez spent. how much did mr. chavez spend altogether?

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

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.)