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SCORPION-xisa [38]
2 years ago
13

Someone that understand this can help me out?

Mathematics
1 answer:
Kryger [21]2 years ago
7 0
Plug in -2 to x in the formula
So f(-2)= ((-2)+1)^2
Your answer should be: 1
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HELP ME PLEASE!!!!!! I WILL GIVE BRAINLIEST!!!!!!<br><br><br><br> Very simply btw
Bumek [7]

Answer:

#1 is a cereal box  

#2 is a water bottle

#3 is the amount of space a 3 dimensional object takes up

Hope this helps :)

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3 years ago
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The daily high temperatures were recorded in Montana for four days in February. They are listed in the table below. Day Temperat
ale4655 [162]
The average would be about 4 degrees( i think)

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3 years ago
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A box contains 5 red and 5 blue marbles. Two marbles are withdrawn randomly. If they are the same color, then you win $1.10; if
topjm [15]

Answer:

a) The expected value is \frac{-1}{15}

b) The variance is  \frac{49}{45}

Step-by-step explanation:

We can assume that both marbles are withdrawn at the same time. We will define the probability as follows

#events of interest/total number of events.

We have 10 marbles in total. The number of different ways in which we can withdrawn 2 marbles out of 10 is \binom{10}{2}.

Consider the case in which we choose two of the same color. That is, out of 5, we pick 2. The different ways of choosing 2 out of 5 is \binom{5}{2}. Since we have 2 colors, we can either choose 2 of them blue or 2 of the red, so the total number of ways of choosing is just the double.

Consider the case in which we choose one of each color. Then, out of 5 we pick 1. So, the total number of ways in which we pick 1 of each color is \binom{5}{1}\cdot \binom{5}{1}. So, we define the following probabilities.

Probability of winning: \frac{2\binom{5}{2}}{\binom{10}{2}}= \frac{4}{9}

Probability of losing \frac{(\binom{5}{1})^2}{\binom{10}{2}}\frac{5}{9}

Let X be the expected value of the amount you can win. Then,

E(X) = 1.10*probability of winning - 1 probability of losing =1.10\cdot  \frac{4}{9}-\frac{5}{9}=\frac{-1}{15}

Consider the expected value of the square of the amount you can win, Then

E(X^2) = (1.10^2)*probability of winning + probability of losing =1.10^2\cdot  \frac{4}{9}+\frac{5}{9}=\frac{82}{75}

We will use the following formula

Var(X) = E(X^2)-E(X)^2

Thus

Var(X) = \frac{82}{75}-(\frac{-1}{15})^2 = \frac{49}{45}

7 0
3 years ago
Peyton says the sum of two numbers can never be zero. Explain why Peyton's reasoning is incorrect. Use an example.
Elena-2011 [213]

Answer:

Well, there can be negative numbers added to their positive opposite.

Step-by-step explanation:

For example, -3 + 3 = 0

or you could 0 + 0 = 0

4 0
2 years ago
Mr. Frankel bought 7 tickets to a puppet show and spent $43. He bought a combination of child tickets for $4 each and adult tick
pav-90 [236]
A + C = 7
$9(A) + $4(C) = $43
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