Find the missing complex number.(7 + i)(?) = 55 + 15i
A. 
+ 
i
B. 
+ 
i
C. 8 + i
D. 7 - 1
Answer: C
Mathematics
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Multiply. Simplify by combining like terms.2x(7x2y - 2xy)
A. 10x2 B. 14x3y - 4x2y C. 7x2 - 4x D. 14x2 - 2x
Mathematics
Write the vector v in the form ai + bj, given its magnitude 
and the angle ? it makes with the positive x-axis.
= 8, ? = 90°
A. v = 8i B. v = 8i - 8j) C. v = 8i + 8j D. v = 8j
Mathematics
Find the derivative of y with respect to the independent variable.y = 6x
A. 6x B. 6x ln x C. x ln 6 D. 6x ln 6
Mathematics
Identify the type of surface represented by the given equation.
+ 
+ 
= 1
A. Ellipsoid B. Paraboloid C. Sphere D. Elliptical cone
Mathematics