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Alika [10]
2 years ago
14

5x + 7y = 5 10x + 14y = 10 solve by elimination​

Mathematics
2 answers:
sesenic [268]2 years ago
8 0
Multiply the first equation by -2
Reika [66]2 years ago
6 0

The answer is:

x= 46/5

y= 5/7

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Find the quotient of these Complex Numbers. <br><br><br> (5-i) / (3+2i)
JulsSmile [24]

Let the given complex number

z = x + ix = \dfrac{5-i}{3+2i}

We have to find the standard form of complex number.

Solution:

∴ x + iy = \dfrac{5-i}{3+2i}

Rationalising numerator part of complex number, we get

x + iy = \dfrac{5-i}{3+2i}\times \dfrac{3-2i}{3-2i}

⇒ x + iy = \dfrac{(5-i)(3-2i)}{3^2-(2i)^2}

Using the algebraic identity:

(a + b)(a - b) = a^{2} - b^{2}

⇒ x + iy = \dfrac{15-10i-3i+2i^2}{9-4i^2}

⇒ x + iy = \dfrac{15-13i+2(-1)}{9-4(-1)} [ ∵ i^{2} =-1]

⇒ x + iy = \dfrac{15-2-13i}{9+4}

⇒ x + iy = \dfrac{13-13i}{13}

⇒ x + iy = \dfrac{13(1-i)}{13}

⇒ x + iy = 1 - i

Thus, the given complex number in standard form as "1 - i".

5 0
3 years ago
For the experiment of drawing a single card from a standard​ 52-card deck, find ​(a) the probability of the following​ event, an
BlackZzzverrR [31]
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6 0
3 years ago
Polygon Q is a scaled copy of polygon P using a scale factor of 1/2. Polygon Q's area is what fraction of Polygon P's area.
DaniilM [7]

Answer: Polygon Q's area is 1/4 of Polygon P's area

======================================================

Explanation:

Imagine we had a square with side length 8. The area of this square is 8*8 = 64.

Now let's reduce each side of the square by the scale factor 1/2. So each new side is 8*(1/2) = 4. The area of this smaller square is 4*4 = 16.

Comparing the new area (16) to the old one (64), we see that the new area is 16/64 = 1/4 of the old area.

In other words,

new smaller area = (1/4)*(old larger area)

So this is one example to see why (1/2)*(1/2) = 1/4 is the area scale factor based on the linear scale factor of 1/2. In short, (1/2)^2 = 1/4. Whatever the original scale factor is, square it and you'll get the area scale factor.

4 0
3 years ago
The sides of a triangle have lengths 8, 14, and 15. What kind of triangle is it?
BARSIC [14]
It is an acute triangle bc 8 squared + 14 squared is 260 and that is more than 15 squared (225)
3 0
3 years ago
What is .15 as a fraction
Ahat [919]

Answer:

15/100 which equals 3/20

Step-by-step explanation:

Put 100 below to any decimal that has 2 numbers after zero then simplify

5 0
3 years ago
Read 2 more answers
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