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Sati [7]
3 years ago
10

2x-3yi=14+12i how do I find x and y

Mathematics
2 answers:
vladimir1956 [14]3 years ago
7 0
2x-3yi=14+12i 
=> 2x=14; -3yi=12i => x=7; y=-4
egoroff_w [7]3 years ago
4 0

Answer:

The answers are:

x=7\\y=-4

Step-by-step explanation:

In order to determine the answer, we have to know about complex numbers.

The complex numbers have one difference respect on real numbers, they have an imaginary unit i.

In general, a complex number has the next form:

a+b*i

"a" and "b" are real numbers.

We can not add the imaginary part (where it is the imaginary unit) with the real part.

In this case, we have an equality, where in the right side, we can see a complex number and in the left side, we can see two variables and the imaginary unit. We just have to build two equation: one for the real part and other one for the imaginary part.

2x=14\\x=7\\\\-3y=12\\y=-4

Finally, the values of the variables to fulfil the equality are:

x=7\\y=-4

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Number of dimes collected is 339 and number of nickels collected is 113

<em><u>Solution:</u></em>

Given that There is a total of $39.55

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To find: Number of dimes and nickels collected

Let "d" be the number of dimes collected

Let "n" be the number of nickels collected

We know that,

1 dime = $ 0.10

1 nickel = $ 0.05

From given information,

There are 3 times as many dimes as nickels

So, we get

Number of dimes = 3(number of nickels)

d = 3n

Given that there is total of $ 39.55

number of dimes collected x value of 1 dime + number of nickels collected x value of 1 nickel =  $ 39.55

3n \times 0.10 + n \times 0.05 = 39.55\\\\0.3n + 0.05n = 39.55\\\\0.35n = 39.55\\\\n = \frac{39.55}{0.35}\\\\n = 113

Substitute n = 113 in d = 3n

d = 3(113) = 339

<em><u>Summarizing the results:</u></em>

number of dimes collected = 339

number of nickels collected = 113

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