SOLUTION: 6) The test scores in Mrs. Kaste's Math B class are normally distrubuted with a mean of 85 and a standard deviation of 5. Between what two scroes would 95.4 percent of the scores f

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Question 173035This question is from textbook Amsco's Preparing for the Regents Examination Mathematics B
: 6) The test scores in Mrs. Kaste's Math B class are normally distrubuted with a mean of 85 and a standard deviation of 5. Between what two scroes would 95.4 percent of the scores fall?
1) 70-100 2) 75-95 3) 80-90 4) 85-90
7) The heights of the tides at jones beach, ny are a function of the time of day. The time from oine high tide to another is approximately 13 hours. Which of the following types of functions would best model this situation?
*Explain why for the graph
1) exponential 2) linear 3) logarithmic 4) trignometric
8) Solve for x: (3 + 2i) + (4 + xi)= 7 - 5i
1) -7 2) -3 3) 3 4)7
Show work please, thanksThis question is from textbook Amsco's Preparing for the Regents Examination Mathematics B

Answer by nycsub_teacher(90) About Me  (Show Source):
You can put this solution on YOUR website!
8) Solve for x: (3 + 2i) + (4 + xi)= 7 - 5i

First simplify (3 + 2i) + (4 + xi) = 7 + (2 + x)i
Next, equate 7 + (2 + x)i to 7 - 5i
7 + (2 + x)i = 7 - 5i
7 + 2i + xi = 7 - 5i
2i + xi = -7 + 7 - 5i
2i + xi = -5i
xi = -5i - 2i
xi = -7i
x = -7i/i
x = -7
Understood?