Perform the indicated operation. Write the result in the form a + bi.(9 - 3i)(2 + 4i)

A. 30 - 30i
B. 30+ 30i
C. 42 + 6i
D. 6 - 42i

Answer: B

Mathematics

You might also like to view...

Evaluate the double integral over the given region. R = 

A.
B.
C.
D. ?

View
Mathematics

Solve the system by the elimination method or a combination of the elimination and substitution methods.5x2 + 3xy - 5y2 = -9 x2 - xy - y2 = -5

A. {(-1, 2), (1, -2), (2i, i), (-2i, -i)}
B. {(-1, -2), (1, 2), (2i, -i), (-2i, i)}
C.
D.

View
Mathematics

Find the amount that will be in an account, given the stated conditions.P = $480, t = 3, r = 14% compounded quarterly

A. $711.14 B. $245.31 C. $725.31 D. $700.79

View
Mathematics

Simplify the expression. Assume that all variables are positive when they appear.5 + 6

A. 11
B. -23
C. 13
D. 23

View
Mathematics