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yawa3891 [41]
3 years ago
10

The silence of a triangle are 9 12 and 15 is this a right triangle

Mathematics
1 answer:
Lilit [14]3 years ago
3 0

Answer:

Yes because 9 + 12 = 15

Step-by-step explanation:

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<img src="https://tex.z-dn.net/?f=%20-%203%20%2B%205i%20%20%5Cdiv%20%20-%203%20-%204i" id="TexFormula1" title=" - 3 + 5i \div
Likurg_2 [28]

Answer:

\frac{-11}{25}+\frac{-27}{25}i given you are asked to simplify

\frac{-3+5i}{-3-4i}

Step-by-step explanation:

You have to multiply the numerator and denominator by the denominator's conjugate.

The conjugate of a+bi is a-bi.

When you multiply conjugates, you just have to multiply first and last.

(a+bi)(a-bi)

a^2-abi+abi-b^2i^2

a^2+0         -b^2(-1)

a^2+-b^2(-1)

a^2+b^2

See no need to use the whole foil method; the middle terms cancel.

So we are multiplying top and bottom of your fraction by (-3+4i):

\frac{-3+5i}{-3-4i} \cdot \frac{-3+4i}{-3+4i}=\frac{(-3+5i)(-3-4i)}{(-3-4i)(-3+4i)}

So you will have to use the complete foil method for the numerator. Let's do that:

(-3+5i)(-3+4i)

First: (-3)(-3)=9

Outer::  (-3)(4i)=-12i

Inner: (5i)(-3)=-15i

Last: (5i)(4i)=20i^2=20(-1)=-20

--------------------------------------------Combine like terms:

9-20-12i-15i

Simplify:

-11-27i

Now the bottom (-3-4i)(-3+4i):

F(OI)L (we are skipping OI)

First:-3(-3)=9

Last: -4i(4i)=-16i^2=-16(-1)=16

---------------------------------------------Combine like terms:

9+16=25

So our answer is \frac{-11-27i}{25}{/tex] unless you want to seprate the fraction too:[tex]\frac{-11}{25}+\frac{-27}{25}i

6 0
3 years ago
Which of the equations below could be the equation of this parabola? A y = 1/6x2 B. x = -1/6y2 C. x = 1/6y2 D. y = -1/6x2
Schach [20]

Answer:

C

Step-by-step explanation:

assuming the 2s are all squares

just plot a point and it's negative

7 0
3 years ago
Rope is 5 meters long. It is cut into 8 equal parts. How long are each piece?
Murljashka [212]

Answer:

0.625m  PLEASE GIVE BRAINLIEST

Step-by-step explanation:

5 ÷ 8 = 0.625

So.... each piece is 0.625m long.

4 0
3 years ago
Read 2 more answers
a hockey team played n games, losing four of them and winning the rest. The ratio of games won to games lost is
Andrews [41]
Played total n games, and lostcexactly 4:
4:n-4
6 0
3 years ago
A number cube is rolled 240 times. Six comes up 41 times. What is the theoretical probability of rolling a six
Rainbow [258]
Since Theoretical probability is the ratio desired outcomes/total outcomes, the theoretical probability would be 41/240
3 0
3 years ago
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