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Fofino [41]
3 years ago
7

Which complex number is equivalent to (5 + 12i) − (9i2 − 6i), where i = −1 ?

Mathematics
1 answer:
Alchen [17]3 years ago
5 0

Answer:

14 + 18i

Step-by-step explanation:

(5 + 12i) - (9 {i}^{2}  - 6i) \\  = (5 + 12i) - (9 \times  (- 1) - 6i) \\  = (5 + 12i) - ( - 9 - 6i) \\  = (5 + 12i)  +  (  9  + 6i) \\  = 5 + 12i + 9 + 6i \\ \red { \bold{  = 14 + 18i}}

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Help me find B asap!
natka813 [3]

Answer:

11)

complimentary angle

b = 90 - 65

b = 25º

12)

supplementary angle

b = 180 - 117

b = 63º

13)

360º in a circle

b = 360 - 244 -23

b = 93º

14)

vertical angle

b = 46º

3 0
3 years ago
A violin was on sale of 50% off. the sale price is $50. what was the original price
nydimaria [60]
In the given question, there are several important information's that have been given. based on these information's the correct answer to the question can be determined. It is already given that the selling price is $50. 50% off has already been declared.
Then
The amount of sale given on the violin = (50/100) * 50 dollars
                                                             = 25 dollars.
So the sale that has been given on the violin is $25.
Then the original price of the violin = (50 + 25) dollars
                                                        = 75 dollars
So the original price of the violin was $75.
3 0
3 years ago
Read 2 more answers
If EF = 2x - 12, FG = 3x - 17, and EG = 26, find the values of X, EF, and FG.
Dmitriy789 [7]

Answer:

Step-by-step explanation:

2x - 12 + 3x  - 17 = 26

5x - 29 = 26

5x = 55

x = 11

2(11) - 12 = 22 - 12 = 10 EF

3(11) - 17 = 33 - 17 =  16 FG

8 0
3 years ago
Is it one of this <br> 60<br> 50<br> 45<br> 35
dangina [55]
Non of the above. The answer is 40 and I’m sticking to my guns !

Similar meaning you can assume they are proportionate and if every side is doubled then you should double the last. Another way is to use Pythagorean’s theorem and disregard the little triangle completely.


Both ways have me 40 !
7 0
3 years ago
A cleaner charges $0.50 per square foot to polish wood floors. a school hall has a floor area of 30 feet by 50 feet. what would
nexus9112 [7]
First calculate the area of the floor, this would be 30*50 = 1500 square feet
Now multiply the area by the cost for each square foot, so 1500*0.5 = $750
7 0
3 years ago
Read 2 more answers
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