State the phrase as a mathematical expression. Use x to represent the variable.The quotient of a number and five
A. 5x
B. 5 + x
C. 5 - x
D. 
Answer: D
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A 70-foot roll of fabric is cut into three pieces, with each successive piece twice as long as the previous one. Find the length of the longest piece.
A. 40 ft B. 30 ft C. 10 ft D. 80 ft
Solve the problem.Let u = 6i + j, v = i + j, and w = i - j. Find scalars a and b such that u = av + bw.
A. 6v + w B. 6v - w C. 3.500 v + 2.500w D. 0.2857 v + 0.4000 w
150 students in a math class take the final exam. The scores on the exam have an approximately normal distribution with mean ? = 65 and standard deviation ? = 10.Approximately what percent of the students scored between 65 and 75 points?
A. 34% B. 10% C. 68% D. 95% E. none of these
Use the theoretical probability formula to solve the problem. Express the probability as a fraction reduced to lowest terms.You are dealt one card from a standard 52-card deck. Find the probability of being dealt an ace or a 9.
A. 
B. 
C. 10
D. 