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mixer [17]
2 years ago
6

For each relation, decide whether or not it is a function.​

Mathematics
1 answer:
katrin [286]2 years ago
7 0

Answer:

Step-by-step explanation:

Relation 1 is a function

Relation 2 is not a function

Relation 3 is a function

Realation 4 is not a function

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A fair die is rolled 10 times. Find the expected value of:a) the sum of the numbers in the ten rolls;b) the number of multiples
velikii [3]

Answer:

a) 3.5

b) 3.33

c) 6 - 6\left(\begin{array}{ccc}5\\6\end{array}\right)^{10}

Step-by-step explanation:

As given,

A fair die is rolled 10 times

a)

Expected value of Sum of the number in 10 rolls = \frac{1}{6}(1+2+3+4+5+6) = \frac{21}{6}

                                                                                = 3.5

∴ we get

Expected value of Sum of the number in 10 rolls = 3.5

b)

Ley Y : number of multiples of 3

Y be Binomial

Y - B(n = 10, p = \frac{2}{6} )

Now,

Expected value = E(Y) = np = 10×\frac{2}{6}  = 3.33

c)

Let m = total number of faces in a die

⇒m = 6

As die is roll 10 times

⇒n = 10

Now,

Let Y = number of different faces appears

Now,

Expected value, E(Y) = m - m\left(\begin{array}{ccc}m-1\\m\end{array}\right)^{n}

                                  = 6 - 6\left(\begin{array}{ccc}6-1\\6\end{array}\right)^{10} = 6 - 6\left(\begin{array}{ccc}5\\6\end{array}\right)^{10}

5 0
2 years ago
What is the result of adding these two equations?<br> 5x - y = 6<br> - 2x + y = 8
Eddi Din [679]

Answer:

x=14/3

Step-by-step explanation:

5x-y=6

+ -2x+y=8

----------------

5x+(-2x)-y+y=6+8

5x-2x-y+y=6+8

3x=14

x=14/3

I apologize if something is incorrect, please me know how to fix it. Thank you!

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A snail is moving at a rate of three inches every two minutes. How fast is the snail moving in feet per hour?
likoan [24]
8 min

Pls mark brainliest

7 0
2 years ago
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How do you write 2x in radical form
mel-nik [20]
\sqrt{2x}=2x^{\frac{1}{2}}
6 0
3 years ago
Find the slope of the line through the given points.<br> (-2,6) and (2,-2)
Elenna [48]

Answer:

-2

Step-by-step explanation:

We can find the slope using the slope formula

m = ( y2-y1)/(x2-x1)

    = ( -2-6)/(2- -2)

   = ( -2-6)/( 2+2)

   -8/4

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3 years ago
Read 2 more answers
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