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Marrrta [24]
3 years ago
10

Simplify (1 − 4i) − (6 + 9i).

Mathematics
1 answer:
ss7ja [257]3 years ago
8 0

Answer: -5-13i

Work Shown:

(1-4i) - (6+9i) = 1-4i-6-9i

(1-4i) - (6+9i) = (1-6) + (-4i-9i)

(1-4i) - (6+9i ) = -5 - 13i

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=================================================

Explanation:

See the diagram below. The two given angles B = 105 and C = 20 are used to help find angle A

A+B+C = 180

A+105+20 = 180

A+125 = 180

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A = 55

Then we use the law of sines to find the side length c

sin(A)/a = sin(C)/c

sin(55)/15 = sin(20)/c

c*sin(55) = 15*sin(20) ... cross multiply

c = 15*sin(20)/sin(55)  .... divided both sides by sin(55)

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Answer:

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Step-by-step explanation:

4 0
3 years ago
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Alex

Answer:

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Step-by-step explanation:

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30d - 60 = sister

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Equation:

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5 0
3 years ago
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Maru [420]
What’s your question?
3 0
3 years ago
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