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3 years ago

14

List domain and Range in interval notation, then decide if it is a function or not.

1 answer:

oksano4ka [1.4K]3 years ago

5 0

Domain are for x-values so [0,3] and range are y-values so [2,-2]. It is not a function because there are multiple x-values for y-values. The only thing I am not sure about is whether to use brackets [ ] and/or parentheses ( ) because the graph does not use circles. Hope this helped!

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Can someone please help me

Ket [755]

Answer:

the answer should be -4

Step-by-step explanation:

-4 squared would be 8. 3 multiplied by -4 would be -12. 8 + -12 = -4. -4 + 4 = 0

4 0

3 years ago

A probability distribution for a random variable Y is given by P(Y=y)=cy, for y=1,2,4,5 and c is a constant. Find E(Y), the expe

Dahasolnce [82]

Answer:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

Step-by-step explanation:

For this case we know the following probability mass function given:

$P(y) = cy , y= 1,2,4,5$

For this case we need to satisfy the following condition in order to have a probability distribution function:

$\sum_{i=1}^n P(y_i) =1$

And we have this:

$c(1+2+4+5) =1$

$c =\frac{1}{12}$

Now we can find the expected value with this formula:

$E(Y) =\sum_{i=1}^n Y_i P(Y_i) =\sum_{i=1}^n cy_i *y_i = cy^2_i$

And replacing we got:

$E(Y) = \frac{1}{12} (1^2 + 2^2 + 4^2 +5^2) = \frac{46}{12}= \frac{23}{6}$

6 0

3 years ago

A rectangle has a length of 5^3 units and a width of 5^2 units. What is the area of the rectangle? Write your answer as a power

katen-ka-za [31]

Answer:

points sorry

Step-by-step explanation:

i need points for my questions sorry

8 0

3 years ago

astra-53 [7]

Answer:

none of the above

Step-by-step explanation:

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3 years ago

. Gemma plans to run 5 miles her first week and increase the amount she runs each week by 20% Which of the following is closest

Ksivusya [100]

The answer is obviously D because of the amout of miles ran each week

7 0

2 years ago