Determine whether the given events are mutually exclusive.Knowing Spanish and knowing Chinese
A. No
B. Yes
Answer: A
Mathematics
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Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. infinitely many solutions; {
x = 7} or {
x = -6}
B. {(-6, 7)}
C. no solution; ?
D. {(7, -6)}
Mathematics
Find the reciprocal of the number.-8
A. 8
B. 0
C. 
D. - 
Mathematics
Solve for real roots.x2/5 - x1/5 - 2 = 0
A. x = 32, -1 B. x = 2, -1 C. x = -2, 1 D. x = -32, 1
Mathematics
Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.The test scores of 40 students are summarized in the frequency distribution below. Find the standard deviation. 
A. 15.8 B. 13.5 C. 14.3 D. 15
Mathematics