When solving this system of equations using linear combination, what should you do FIRST?{−x+y=−11 {2x+y=19

A) Solve the first equation for y.

B) Multiply the first equation by -1.

C) Multiply the first equation by -2.

D) Add the two equations together.

What describes horizontal cross section of the right rectangle 6m 8m 5m

Astick 2 m long is placed vertically at point b. the top of the stick is in line with the top of a tree as seen from point a, which is 3 m from the stick and 30 m from the tree. how tall is the tree?

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.)