Write the expression in the standard form a + bi.(-9 + i)(-9 - i)
A. 82
B. 81
C. -9
D. -80
Answer: A
Mathematics
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Solve the problem.A ship is moving around an island on a route described by 
If 
find the magnitude and direction of the ship's velocity where 
A. 19.6 km/h, 84° B. 17.9 km/h, 6° C. 19.6 km/h, 6° D. 17.9 km/h, 84°
Mathematics
Find the missing length.If ?ABC ~ ?XYZ, find AC.
A. 11 B. 15 C. 5 D. 10
Mathematics
Perform the indicated operations. Express the answer as a single polynomial in standard form.-3x5(5x5 - 5x3 + 7)
A. -15x10 - 5x3 + 7 B. -15x10 + 15x8 - 21x5 C. -15x10 + 15x8 D. -15x5 + 15x3 - 21
Mathematics
Match the system of inequalities with the appropriate graph.x + 2y ? 2 x + y ? 0
A. 
B. 
C. 
D. 
Mathematics