Multiply as indicated. If possible, simplify any square roots that appear in the product.(
+ 
)(
- 
)
A. 8z
B. 8 - 2
C. 8 - 2
D. 8 - z
Answer: D
Mathematics
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Write the complex number in rectangular form.9(cos ? + i sin ?)
A. 9 B. 9i C. -9 D. -9i
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Solve the problem.The sum of a student's three scores is 221. If the first is 20 points more than the second, and the sum of the first two is 26 more than twice the third, what was the first score?
A. 68 B. 45 C. 65 D. 88
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Convert 541 picograms to nanograms.
a. 0.541 ng b. 54.1 ng c. 5410 ng d. 541000 ng
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Multiply and simplify.
? 
A. 5m
B. 
C. 
D. 10
Mathematics