Write the expression in the standard form a + bi.(6 + 6i) - (-7 + i)
A. -1 + 7i
B. 13 + 5i
C. 13 - 5i
D. -13 - 5i
Answer: B
Mathematics
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Determine whether the argument is valid or invalid.If Ann so wishes, then Bill will be the president. Manuel is a public defender or Bill will be the president. Manuel is not a public defender. Therefore, Ann does not so wish.
A. Invalid B. Valid
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Express the trigonometric function in terms of the same function of a positive acute angle.cos 405°
A. -cos 45° B. -cos 90° C. cos 45° D. cos 90°
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Evaluate the integral.
A. 
B. 
C. 
D. 
Mathematics
Fill in the blank.The measure of an obtuse angle is 
.
A. 180° B. 90° C. between 0° and 90° D. between 90° and 180°
Mathematics