Add the complex numbers: (4 + 8i) + (–2 – i) Question 6 options: A) 6 + 7i B) 2 + 9i C) 2 + 7i D) 6 + 9i
1 answer:
Answer:
C) 2+7i is the correct answer.
Step-by-step explanation:
simplify by combining the real and imaginary parts of each expression. in this question, the variable i represents an imaginary number.
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5
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B and E 2020
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630
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(8×15) + (34×15)= 630
18% + 8.5% = 26.5% which is close to 25%
25% of 40 is 10, 40 +10 = 50
so the total bill would be just over $50
real cost:
40*0.085 = 3.40 = 40 + 3.40 = 43.40
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