Compute and simplify so that only positive exponents remain.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: D
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Write the set in set-builder notation.{a, b, c, . . . , x, y, z}
A. {x|x is a vowel} B. {x|x is a letter of the alphabet} C. {x|x is a consonant} D. {x|x is a number}
Find the center and the radius of the circle.3x2 + 3y2 + 6x - 12y - 60 = 0
A. (-1, 2), r = 5 B. (-2, 1), r = 25 C. (1, -2), r = 25 D. (2, -1), r = 5
Solve the system by substitution, if possible.
A) (11, –2)
B) (8, 4)
C) (–3, 12)
D) (–4, –7)
E) no solution; inconsistent system
Solve the problem.Dmitri needs 9 liters of a 69% solution of sulfuric acid for a research project in molecular biology. He has two supplies of sulfuric acid solution: one is an unlimited supply of the 81% solution and the other an unlimited supply of the 54% solution. How many liters of each solution should Dmitri use?
A. 4.5 L of 81% solution; 4.5 L of 54% solution B. 4 L of 81% solution; 5 L of 54% solution C. 5 L of 81% solution; 4 L of 54% solution D. 5.5 L of 81% solution; 3.5 L of 54% solution