Provide an appropriate response.If an unknown is used in an equation and no coefficient is in front of a letter, it is understood to be a(n):
A. 10
B. unknown
C. 0
D. 1
Answer: D
Mathematics
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Provide an appropriate response.Evaluate 
for x = 4 and y = 8.
A. -1 B. 8 C. 6 D. 72
Mathematics
Write the expression in the standard form a + bi.(1 + i)20
A. -1024 B. 1024 C. 1024i D. -1024i
Mathematics
Provide an appropriate response.Suppose that A is an m × n matrix and B is a p × q matrix. Under what conditions will the sum A + B exist?
A. If m = p and n = q B. If n = p C. It is not possible for the sum to exist. D. The sum will always exist.
Mathematics
Find the conjugate of the number.-4?
A. -4? B. 4 C. 4? D. 0
Mathematics