Simplify.9 + (-6) - (-13) + 3
A. -7
B. 5
C. 19
D. 13
Answer: C
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Solve.Nancy has $1.80 in change. She has three times as many nickels as quarters. She has two more quarters than dimes. How many coins of each type does he have?
A. 6 quarters, 4 dimes, 18 nickels B. 4 quarters, 6 dimes, 12 nickels C. 4 quarters, 2 dimes, 12 nickels D. 12 quarters, 10 dimes, 4 nickels
Provide an appropriate response.Suppose that you are solving a system of three linear equations and have evaluated D, Dx, Dy, and Dz. Under what condition does Cramer's rule not apply?
A. Dx = 0, Dy = 0, or Dz = 0 B. Dx = 0 C. D = 0 D. D = 0; and either Dx = 0, Dy = 0, or Dz = 0
Use a Venn diagram to decide if the statement is true or false.B ? (A ? C) = (A ? B) ? (B ? C) 
A. True B. False
Solve the problem.If two cards are drawn without replacement from an ordinary deck, find the probability that the second card is red, given that the first card was a heart.
A. 
B. 
C. 
D. 