Divide.

A.  - i
B.  + i
C. -  + i
D. -  + i


Answer: D

Mathematics

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Find the missing length, x, for the similar triangles.

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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

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Solve the problem.The critical-path algorithm is

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Perform the indicated operation(s). Simplify if possible.-  - 

A.
B.
C.
D.

Mathematics