Two marbles are drawn without replacement from a box with 3 white, 2 green, 2 red, and 1 blue marble. Find the probability.The second marble is white given the first marble is blue.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Simplify.
2 + 5
÷ 2
A. 3
B. 2
C. 2
D. 3
Mathematics
Solve the problem.A chemist needs 60 milliliters of a 45% solution but has only 39% and 57% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
A. 20 mL of 39%; 40 mL of 57% B. 50 mL of 39%; 10 mL of 57% C. 40 mL of 39%; 20 mL of 57% D. 10 mL of 39%; 50 mL of 57%
Mathematics
Divide. Express the quotient in lowest terms.
÷ 
A. 
B. 
C. 
D. 
Mathematics
Use the vectors in the figure below to graph the following vector. 
2u - z - w 
A. 
B. 
C. 
D. 
Mathematics