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Aleks04 [339]
3 years ago
7

I need help please !

Mathematics
2 answers:
MariettaO [177]3 years ago
6 0

Answer:

let the number of yellow balls be x

then probability of picking yellow ball is x/12

without replacement , probability of picking another yellow ball would be (x-1)/11

probability of picking two yellow balls would be x/12(x-1)/11 =5/33

x2-x=5x132/33=660/33=20

x2-x= 20

x2-x-20=0

(x-5)(x+4)=0

x=5 or x=-4

we disregard x=  -4 hence x=5

Step-by-step explanation:

MrRissso [65]3 years ago
3 0

5 use a calculator and divide it if it shows a five at all in the answer then the answer is five your welcome

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23% put into a fraction
never [62]

Answer:

23/100

Explanation:

23% is 23 out of 100. 23/100 can not be simplified further.

3 0
3 years ago
Read 2 more answers
Prove Euler's identity using Euler's formula.<br> e^ix = cos x + i sin x
Korolek [52]

First list all the terms out.

e^ix = 1 + ix/1! + (ix)^2/2! + (ix)^3/3! ...

Then, we can expand them.

e^ix = 1 + ix/1! + i^2x^2/2! + i^3x^3/3!...

Then, we can use the rules of raising i to a power.

e^ix = 1 + ix - x^2/2! - ix^3/3!...

Then, we can sort all the real and imaginary terms.

e^ix = (1 - x^2/2!...) + i(x - x^3/3!...)

We can simplify this.

e^ix = cos x + i sin x

This is Euler's Formula.

What happens if we put in pi?

x = pi

e^i*pi = cos(pi) + i sin(pi)

cos(pi) = -1

i sin(pi) = 0

e^i*pi = -1 OR e^i*pi + 1 = 0

That is Euler's identity.

3 0
4 years ago
Janelle has a 12-ounce can of soft drink. She drinks 3/5 of the soft drink.
guapka [62]

Answer:

Answer:  4.8 ounces

Step-by-step explanation:

In total there are 12 ounces. If she drinks 3/5 of 12 you multiply 3/5 by 12.

3/5 * 12 would be equal to 3/5 * 12/1 which is 36/5. You have found how much she has drank. 36/5 is also equal to 7.2 ounces. Subtract 7.2 form 12 and you get 4.8 ounces.

Hope this helped!

7 0
3 years ago
Read 2 more answers
Pedro was curious if circles AAA and BBB (with XXX and YYY being on each circle, respectively) were similar, so he tried to map
Ede4ka [16]

it is B the answer B yes B

7 0
1 year ago
Given the perimeter of a rectangle and either the length or​ width, find the unknown measurement using the appropriate formula.
Ad libitum [116K]
The width is 18.

step by step:
1. 2 lengths are 20 which is 20+20 that's 40.
2. 76-40= 36
3. Two widths are 36 cm.
4. so do 36÷2 and that equals 18
8 0
4 years ago
Read 2 more answers
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