Use substitution to determine whether the given x-value is a solution of the equation.cos 2x = - 
, x = 
A. Yes
B. No
Answer: B
Mathematics
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Solve.In a sample of 85 fluorescent bulbs, 4 were found to be defective. At this rate, how many defective bulbs should be found in 425 bulbs?
A. 18 B. 19 C. 21 D. 20
Mathematics
Evaluate the expression according to the order of operations.
+ 
A. 5 B. 13 C. 25 D. 97
Mathematics
Write the number in scientific notation.6,900,000
A. 6.9 × 10-6 B. 6.9 × 106 C. 6.9 × 107 D. 6.9 × 10-7
Mathematics
Find all n complex solutions of the following equation of the form 
x2 = -225
A. 
B. 
C. 
D. 
Mathematics