Perform the indicated operation. Write the answer in the form a + bi.
A. 
B. 
+ 
i
C. - 
- 
i
D. - 
i
Answer: D
Mathematics
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Find v ? u.v = -7i + 4j and u = 5i + 3j
A. -47 B. -23 C. -2i + 7j D. -35i + 12j
Mathematics
Solve by the substitution method. x + 7y = -49-4x + 8y = -56
A. {(7, 0)} B. {(0, -7)} C. {(1, -8)} D. ?
Mathematics
Define the variable expression using the given information.Rasheed's monthly salary is $60 more than Fred's monthly salary. Express Rasheed's monthly salary with an algebraic expression, using the variable f to represent Fred's salary.
What will be an ideal response?
Mathematics
Find the unknown number in the proportion. Write your answer as a whole number or a mixed number if possible.
= 
A. 4
B. 3
C. 12
D. 
Mathematics