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alekssr [168]
2 years ago
6

Item 4

Mathematics
2 answers:
Simora [160]2 years ago
5 0

Answer:

270 s

Step-by-step explanation:

4 minutes = 240s

add the other 30s

boom

BigorU [14]2 years ago
4 0
Sam biked for 270 s

60 x 4 = 240
240 + 30 = 270 s
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What's the Y-intercept and the slope of the following equation x–5=y
forsale [732]

Answer:

slope is 1 and y-intercept is (0,-5)

Step-by-step explanation:

3 0
3 years ago
Find the missing angle. Find X
olga55 [171]

Answer:

I don’t know 160.

Step-by-step explanation:

20 plus 160 equals 180.

4 0
3 years ago
Keith wants to make cupcakes. To make cupcakes he needs 1 3/10 cups of flour per batch of cupcakes. If Keith has 13 cups of flou
marin [14]

Answer: Keith can make 10 batches of cupcakes.

Step-by-step explanation:

To make cupcakes, he needs 1 3/10 cups of flour per batch of cupcakes. Converting 1 3/10 cups of flour into improper fraction, it becomes 13/10 cups of flour.

Let x represent the number of batches of cupcakes that Keith can make If Keith has 13 cups of flour, . Therefore,

13/10 cups of flour = 1 batch of cupcakes

13 cups of flour = x batch of cupcakes

Cross multiplying, it becomes

13/10 × x = 13 × 1

13x/10 = 13

13x = 13 × 10 = 130

x = 130/13 = 10

4 0
3 years ago
On a coordinate plane, solid circles appear at the following points: (negative 3, 2), (negative 3, 3), (1, 4), (1, negative 4),
goldenfox [79]

Answer: Three points

Step-by-step explanation:

(-3,2)     (-3,3)    (1,4)   (1,-4)  (2,-4)  (2,-2)

Looking at these points we could say there all doesn't represent a function because each input doesn't exactly assigns one output.

for example -3 the input assigns two different outputs  2 and 3

1  the input   also assigns two different outputs 4 and -4

and lastly 2 the input assigns two different outputs -4 and -2

This makes it not a function but if we take away the coordinates

(-3,3) ( 1,-4) and (2,-4) it becomes a function because you will have the coordinates (-3,2) (1,4) (2,-2)  and as you could see every input has exactly one output.

8 0
3 years ago
Read 2 more answers
A game popular in Nevada gambling casinos is Keno, which is played as follows: Twenty numbers are selected at random by the casi
boyakko [2]

The missing part in the question;

and the payoff is $2.20 won for every dollar bet. (As the player’s probability of winning in this case is \dfrac{1}{4}........

Also:

For such a bet, the casino pays off as shown in the following table.

The table can be shown as:

Keno Payoffs in 10 Number bets

Number of matches        Dollars won for each $1 bet

0  -   4                                        -1

5                                                  1

6                                                  17

7                                                  179

8                                                 1299

9                                                 2599

10                                               24999

Answer:

Step-by-step explanation:

Given that:

Twenty numbers are selected at random by the casino from the set of numbers 1 through 80

A player can select from 1 to 15 numbers; a win occurs if some fraction of the player’s chosen subset matches any of the 20 numbers drawn by the house

Let assume X to represent the numbers of player chooses which are in the Casino-selected-set of 20.

Let assume the random variable X has a hypergeometric distribution with parameters  N= 80 and m =20.

Then, the probability mass function of a hypergeometric distribution can be defined as:

P(X=k)=\dfrac{(^m_k)(^{N-m}_{n-k})}{(^N_n)}, k =1,2,3 ... n

Now; the probability that i out of  n numbers chosen by the player among 20  can be expressed as:

P(X=k)=\dfrac{(^{20}_k)(^{60}_{n-k})}{(^{80}_n)}, k =1,2,3 ... n

Also; given that ; When the player selects 2 numbers, a payoff (of odds) of $12 won for every $1 bet is made when both numbers are among the 20

So; n= 2; k= 2

Then :

Probability P ( Both number in the set 20)  =\dfrac{(^{20}_2)(^{60}_{2-2})}{(^{80}_2)}

Probability P ( Both number in the set 20) = \dfrac{20*19}{80*79}

Probability P ( Both number in the set 20) =\dfrac{19}{316}

Probability P ( Both number in the set 20) =\dfrac{1}{16.63}

Thus; the payoff odd for =\dfrac{1}{16.63} is 16.63:1 ,as such fair payoff in this case is $16.63

Again;

Let assume X to represent the numbers of player chooses which are in the Casino-selected-set of 20.

Let assume the random variable X has a hypergeometric distribution with parameters  N= 80 and m =20.

The probability mass function of the hypergeometric distribution can be defined as :

P(X=k)=\dfrac{(^m_k)(^{N-m}_{n-k})}{(^N_n)}, k =1,2,3 ... n

Now; the probability that i out of  n numbers chosen by the player among 20  can be expressed as:

P(n,k)=\dfrac{(^{20}_k)(^{60}_{n-k})}{(^{80}_n)}, k =1,2,3 ... n

From the table able ; the expected payoff can be computed as shown in the attached diagram below. Thanks.

8 0
3 years ago
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