Find the equation of a circle satisfying the given conditions.Center: (0, -4); radius: 
A. x2 + (y + 4)2 = 11
B. x2 + (y - 4)2 = 11
C. (x - 4)2 + y2 = 121
D. (x + 4)2 + y2 = 121
Answer: A
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Translate to a system of three equations; then solve.A company sells nuts in bulk quantities. When bought in bulk, peanuts sell for $1.45 per pound, almonds for $2.60 per pound, and cashews for $3.40 per pound. Suppose a specialty shop wants a mixture of 210 pounds that will cost $2.56 per pound. Find the number of pounds of each type of nut if the sum of the number of pounds of almonds and cashews is twice the number of pounds of peanuts. Round your answers to the nearest pound.
A. Peanuts: 90 lb., almonds: 70 lb., cashews: 50 lb. B. Peanuts: 50 lb., almonds: 90 lb., cashews: 70 lb. C. Peanuts: 70 lb., almonds: 50 lb., cashews: 90 lb. D. Peanuts: 80 lb., almonds: 50 lb., cashews: 80 lb.
Write the equation of the line with the given slope and y-intercept.m = 
, b = -2
A. y = 
x - 2
B. y = 
x + 2
C. y = - 
x - 2
D. y = - 
x + 2
Solve the problem.Earth is represented on a map of the solar system so that its surface is a circle with the equation 
A weather satellite circles 0.8 units above the Earth with the center of its circular orbit at the center of the Earth. Find the general form of the equation for the orbit of the satellite on this map.
A. x2 + y2 + 6x + 10y - 3785.24 = 0 B. x2 + y2 - 6x - 10y - 3785.24 = 0 C. x2 + y2 + 6x + 10y + 33.36 = 0 D. x2 + y2 + 6x + 10y - 26.36 = 0
Replace the question mark with the appropriate symbol < or >.33 ? 37
A. > B. <