Solve the problem.A comet has an orbit that is in the shape of an ellipse with the Sun at one of the foci. The equation is approximately 
where x and y are in astronomical units (an astronomical unit is 93,000,000 miles). Sketch the graph of the comet.
A. 
B. 
C. 
D. 
Answer: C
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Determine whether the triangles in the given pair are congruent. If so, state the property that shows the triangles are congruent.
A. congruent; SSS B. congruent; AAS C. not congruent D. congruent; ASA
Perform the indicated operation and write the answer in simplest form.
? 
A. 
B. 
C. 
D. 
Evaluate f(x) at the given value of x.f(x) = 
; x = -11
A. 
B. 
C. - 
D. 
Solve the problem.Suppose an animal feed to be mixed from soybean meal and oats must contain at least 100 lb of protein, 20 lb of fat, and 12 lb of mineral ash. Each 100-lb sack of soybean meal costs $20 and contains 50 lb of protein, 10 lb of fat, and 8 lb of mineral ash. Each 100-lb sack of alfalfa costs $11 and contains 30 lb of protein, 8 lb of fat, and 3 lb of mineral ash. How many sacks of each should be used to satisfy the minimum requirements at minimum cost?
A. 
sacks of soybeans and 
sacks of alfalfa
B. 2 sacks of soybeans and 0 sacks of alfalfa
C. 0 sacks of soybeans and 2 sacks of alfalfa
D. 
sack of soybeans and 
sack of alfalfa