4. when megan solved this system using the elimination method, she added the equations together and got the equation 4y = 16. then she solved that equation and got y = 4. then she substituted 4 in the first equation for y and solved for x. she got x = 4. the point (4, 4) is not the correct solution. state in a complete sentence where she made her first mistake. what is the correct solution to the system? 2x + 3y = 20 -2x + y = 4

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.)

Acabinmaker buys 3.5 liters of oat varnish the varnish cost $4.95 per liter what is the total cost of 3.5 liters

Given sin28.4=.4756, cos28.4=.8796, and tan28.4=.5407 find the cos of 61.6