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Salsk061 [2.6K]
3 years ago
6

Simplify 2i/-4 + 3i please

Mathematics
2 answers:
zloy xaker [14]3 years ago
7 0

2i

−4

+3i

=

5

2

i

Step-by-step explanation:

i think it helps

lord [1]3 years ago
7 0

Answer:

\frac{6}{25} - \frac{8}{25} i

Step-by-step explanation:

Assuming you mean

\frac{2i}{-4+3i}

To simplify, rationalise the denominator

Multiply the numerator/ denominator by the conjugate of the denominator

The conjugate of - 4 + 3i is - 4 - 3i , then

= \frac{2i(-4-3i)}{(-4+3i)(-4-3i)} ← expand numerator and denominator

= \frac{-8i-6i^2}{16-9i^2} [ note that i² = - 1 ]

= \frac{-8i+6}{16+9}

= \frac{6-8i}{25}

= \frac{6}{25} - \frac{8}{25} i ← in standard form

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The school that Jack goes to is selling tickets to a choral performance. On the first day of ticket sales the school sold 9 seni
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Answer:

Price of a senior citizen ticket is $4 and price of a student ticket is $15 .

Step-by-step explanation:

Let us assume that the price a senior citizen ticket be x .

Let us assume that the price a student citizen ticket be y .

As given

The school that Jack goes to is selling tickets to a choral performance.

On the first day of ticket sales the school sold 9 senior citizen tickets and 8 student tickets for a total of $156.

Equtaions becomes

9x + 8y = 156

As given

The school took in $163 on the second day by selling 7 senior citizen tickets and 9 student tickets.

Equations becomes

7x + 9y = 163

Multipy 9x + 8y = 156 by 9 .

81x + 72y = 1404

Multiply 7x + 9y = 163  by 8 .

56x + 72y = 1304

Subtracted 56x + 72y = 1304 from 81x + 72y = 1404 .

81x - 56x + 72y - 72y = 1404 - 1304

25x = 100

x = \frac{100}{25}

x = $ 4

Putting value of x in the 56x + 72y = 1304 .

56 × 4 + 72y = 1304

224 + 72y = 1304

72y  = 1304 - 224

72y = 1080

y = \frac{1080}{72}

y = $15

Therefore the price of a senior citizen ticket is $4 and price of a student ticket is $15 .


5 0
3 years ago
Mr. Nelson bought a car for $20,000 with a 5% interest rate.
MrMuchimi

Answer:

Step-by-step explanation:

do you know the answer

4 0
4 years ago
Are constant functions periodic? The reason I ask this is because a function is periodic if it has a period but in a constant fu
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Answer:

A function f:R→R is periodic if there exists some number t>0 such that

f(x)=f(x+t)

A constant function is periodic since you can take t=1,t=2, etc. (Hint: Hover over the tag "periodic-functions". What do you see?)

The fundamental period of f is the smallest of such t's. Since t cannot be 0, you are looking for the minimum of (0,∞), which does not exist.

Step-by-step explanation:

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2 years ago
Which of the following is the correct factorization of the polynomial below 8x^3+64y^3
dolphi86 [110]

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this is known as the sum of cubes

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8 0
3 years ago
Read 2 more answers
A sequence is created from the function k(n) = 2n + 3, where n represents the position of the term of the sequence. The sequence
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Substitute the n value into the equation. The n repersents the 'nth' term.
K (1) = 2(1) + 3
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Therefore, when n = 1, K = 5
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K (3) = 2(3) + 3
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So, when n = 3, K=9

Just keep applying the same rule. Also, make sure that you answer it with a sentence at the end. This should always help you and the marker see that you are confidence with your answer...

I hoped I helped out. Good luck. :)

3 0
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