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Dmitry_Shevchenko [17]
3 years ago
11

If (2 − 3i) + (x + yi) = 6, what is x + yi?

Mathematics
1 answer:
Andrew [12]3 years ago
5 0
(2 - 3i) + ( x + yi) = 6
(x + yi) = 6 - (2 - 3i)
Distribute the - to the 2 - 3i and get
x + yi = 6 - 2 + 3i
Accumulate like terms.
x + yi = 4 + 3i. Answer
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Please help me to figure out this question. Thanks
Marta_Voda [28]

Answer:

a) 5 : 7

b) 25 black keys

c) 100 black keys will appear.

Step-by-step explanation:

a) From the picture,

There are 5 black keys and 7 white keys.

Therefore, the ratio of black keys to white keys are = 5 : 7 = 5/7

b) If the pattern continues, 25 black keys will be appeared on a portable full-sized keyboard.

Explanation -

From part A, we get the ratio of black keys to white keys = 5 : 7. Therefore,

If there are 7 white keys, there are 5 black keys

If there are 1 white keys, there are 5/7 black keys

If there are 35 white keys, there are (5*35)/7 black keys

= 25 black keys.

c) If there are 240 keys, the black keys will appear -

We get, the ratio of black keys to white keys = 5 : 7

The summation of the black keys and white keys = (5 + 7) = 12.

Therefore, if there are 240 keys, the black keys will be

= (5/12) x 240

= (5 x 240)/12

= 100

Therefore, there are 100 black keys.

7 0
3 years ago
How is 1/5 changed to a decimal​
Ksenya-84 [330]

Answer:

just divide 1/5 by 100 and you should get it

Step-by-step explanation:

3 0
3 years ago
Show that x+y:x-y=3:2
ycow [4]

We have,

x+y:x-y=3:2

To prove that, x+ y : x - y = 3:2.

x+y=3  

And,

x+y = 2      

Adding (1) and (2), we get

x+y+x-y=3+2

⇒2x=5

⇒ x =

Put x =  in (1), we get

+y=3

⇒ y=3-=

x+y:x-y=

=3:2

So, x+y:x-y=3:2.

8 0
2 years ago
What is the area of a triangle that has a height of 6 feet and a base length of 7 feet? (5 points)
Oksanka [162]
Formula= Base times height divided by 2
               

6 x 7= 42
42/ 2
answer= 21
3 0
3 years ago
Read 2 more answers
1. Jackie is a toll booth employee. One day, she wrote the expression: 0.75m = 15.75
Yanka [14]
Question B) you want to take 0.75, divide it to both sides and you get m= 21          0.75m=15.75      m =  21                                                                                     ___________  =                                                                                                          0.75             
4 0
4 years ago
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