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OLEGan [10]
4 years ago
11

Multiply the complex numbers: (4 + 6i)(1∕2 + 3i)

Mathematics
1 answer:
Firlakuza [10]4 years ago
6 0

Answer:

B) 20 + 15i

Step-by-step explanation:

So first you need to foil the equation (a + bi)(c + di) = ac +adi +bic +bidi. then you need to combine like terms. Remember that i^2 = 1 and i = i.

Then write your final answer in the terms a + bi

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F/4-5=-9 how do you do this problem
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Answer:

F = -16

Step-by-step explanation:

F/4-5=-9

Add 5 to each side

F/4-5+5=-9+5

F/4=-4

Multiply each side by 4

F/4 *4=-4*4

F = -16

5 0
3 years ago
Plz Help ASAP! I will mark Brainliest!
Olenka [21]

Answer:

∠A = 70°, ∠B = 50°, and ∠C = 60°.

Step-by-step explanation:

In a triangle ΔABC, ∠A + ∠B + ∠C = 180° ......... (1), we know from the property of triangle.

Now, the sum of ∠C and the exterior angle adjacent to ∠C is 180°.

If the exterior angle adjacent to ∠C is 120°, then ∠C = 180° - 120° = 60°.

Now, from equation (1), ∠A + ∠B = 180° - ∠C = 180° - 60° = 120° ......... (2)

Now, given that ∠A = 2x and ∠B = x + 15.

Hence, from equation (2), we have, 2x + x + 15 = 120

⇒ 3x = 105

⇒ x = 35.

Therefore, ∠A = 2x = 2 × 35 = 70°

∠B = x + 15 = 35 + 15 = 50°

and ∠C = 60° (Answer)  

3 0
3 years ago
Which complex number is equivalent to (7-9i)-(-1+3i)?
son4ous [18]
Just like algebra
i lis like x
distribute invisible -1 to second set
-1(-1+3i)=1-3i

now we have
7-9i+1-3i
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