Multiply. Assume that no radicands were formed by raising negative numbers to even powers.(
+ 
)(
- 
)
A. 7 - z
B. 7 - 2
C. 7z
D. 7 - 2
Answer: A
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Solve the problem.Scores on a test are normally distributed with a mean of 71 and a standard deviation of 5. What is the percentile for an exam score of 67? Round the percentile to the nearest tenth.
A. 19.9 B. 2.4 C. 21.2 D. -0.8
Solve the system using Gaussian elimination. -3x - 9y + 9z = 42 9x + 27y - 27z = -126-12x - 36y + 36z = 168
A. {(x, y, z) 
-3x - 9y + 9z = 42}
B. ?
C. {(x, y, z) 
-12x - 36y + 36z = 42}
D. {(-8, -9, -7)}
Perform the indicated operations. Write the result in the form a + bj.j4
- j
- 3j
A. 4
- 3j
B. 2
- 3j
C. 
j
D. 2
+ 3j
Solve the problem.The following table shows the market prices per pound that a trucker can get for his load of fruit in three cities: San Francisco (S.F.), Las Vegas (L.V.), and Los Angeles (L.A).
The trucker has a load of 4000 pounds of peaches and 3000 pounds of apples. Write the information from the table as a 2 x 3 matrix B. Write a row matrix A for which the entries represent the number of pounds of each type of fruit in the truck. If 
, find c12. What does this entry of C represent?
A. c12 = 2800. c12 represents the total value of the load in Las Vegas. B. c12 = 4800. c12 represents the total value of the load in Las Vegas. C. c12 = 4800. c12 represents the total value of the load in San Francisco. D. c12 = 2450. c12 represents the total value of the load in Las Vegas.