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AlekseyPX
3 years ago
12

If you rolled a fair number cube 1-6, 12 times, about how many times would you expect to roll a 5 or a 6?

Mathematics
1 answer:
Sav [38]3 years ago
4 0
Well it is definately not c haha. I would say 3 because it is a pretty even chance of getting three.
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Ameekah is working with consecutive integers
Irina-Kira [14]

Consecutive numbers: 1, 2, 3, 4, 5.

As we can see it's the latest plus 1

So,

x, x + 1, x + 1 + 1, x + 1 + 1 + 1

x, x + 1, x + 2, x + 3 and so on

So it's x + 1.

7 0
3 years ago
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5 0
3 years ago
Expand (2+x)^-3<br><br><br><br><br><br><br><br> ....
pentagon [3]

Answer:

1/(x^3 + 6x^2 + 12x + 8)

Step-by-step explanation:

The first thing we do is rationalize this expression. (2+x)^-3 is written as

1/(2+x)^3

Then from there we can foil out the denominator. It is easiest to foil (2+x)(2+x) first and then multiply that product by (2+x).

(2+x)(2+x) = 4 + 4x + x^2

(4+4x+x^2)(2+x) = 8+8x+2x^2+4x+4x^2+x^3.

Then we combine like terms and put them in order to get:

x^3 + 6x^2 + 12x + 8

And of course we can't forget that this was raised to the negative third power, so our answer is 1/(x^3 + 6x^2 + 12x + 8)

6 0
2 years ago
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What is 5/8 -(1/4)2 equals?
Arturiano [62]
Order of operations 

5/8 = 0.625
 1/4 = 0.25 

0.25*2 = 0.5 

0.625-0.5 = 0.125 

so the final answer is 0.125
5 0
3 years ago
There 77 students 7:4
melisa1 [442]

Answer:

49:28

Step-by-step explanation:

7+4=11

77/11=7

7*7=49

4*7=28

6 0
3 years ago
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