Find the nth, or general, term.1, 9, 81, . . .
A. 9n-1
B. 9n
C. 91-n
D. 9(n - 1)
Answer: A
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Using the graph of the ellipse, determine the coordinates of the foci, vertices, and center.
A. Foci (-5, -3) and (1, -3), vertices (-2, 1) and (-2, -7), center (-2, -3)
B. Foci (-2, 1) and (-2, -7), vertices (-2, -3 ± 
), center (2, 3)
C. Foci (-2, -3 ± 
), vertices (-2, 1) and (-2, -7), center (-2, -3)
D. Foci (-2, -3 ± 
), vertices (-5, -3) and (1, -3), center (-2, -3)
Solve the problem.When the temperature stays the same, the volume of a gas is inversely proportional to the pressure of the gas. If a balloon is filled with 102 cubic inches of a gas at a pressure of 14 pounds per square inch, find the new pressure of the gas if the volume is decreased to 51 cubic inches.
A. 26 psi
B. 28 psi
C. 14 psi
D. 
psi
Find the median of the set of numbers.
, 1, 
, 
, 
A. 
B. 
C. 
D. 
Use a system of linear equations to solve the problem.A chemist needs 180 milliliters of a 25% solution but has only 1% and 37% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 65 mL of 1%; 115 mL of 37% B. 120 mL of 1%; 60 mL of 37% C. 65 mL of 1%; 120 mL of 37% D. 60 mL of 1%; 120 mL of 37%