Write the expression in the standard form a + bi.5(3 - 4i)
A. 15 - 20i
B. 15i - 4i
C. 3 - 20i
D. 15 + 20i
Answer: A
Mathematics
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Translate to a system of two equations, then solve.There were 420 people at a play. The admission price was $3 for adults and $1 for children. The admission receipts were $780. How many adults and how many children attended?
A. 180 adults and 240 children B. 195 adults and 225 children C. 240 adults and 180 children D. 120 adults and 300 children
Mathematics
Which of the first three prime numbers - 2, 3 and 5 - are factors of the following?2886
A. 3, 5 B. 2, 3 C. 2, 3, 5 D. 3
Mathematics
Perform the indicated operation.-38 + 16
A. -22 B. 54 C. 22 D. -54
Mathematics
Without using a calculator, determine the value of the trigonometric function or state that the value is undefined.tan 
A. -1 B. undefined C. 0 D. 1
Mathematics