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seraphim [82]
2 years ago
15

Sydney is going to a carnival that has games and rides. Each game costs $1.25 and

Mathematics
1 answer:
Ira Lisetskai [31]2 years ago
6 0

Answer:

Sidney played 5 games and rode 8 rides.

Step-by-step explanation:

Since Sydney is going to a carnival that has games and rides, and each game costs $ 1.25 and each ride costs $ 2.25. Sydney spent $ 24.25 altogether at the carnival and the number of rides she went on is 3 more than the number of games she played, to determine the number of games Sydney played and the number of rides Sydney went on the following calculation must be performed:

5 x 2.25 + 2 x 1.25 = 11.25 + 2.50 = 13.75

6 x 2.25 + 3 x 1.25 = 13.50 + 3.75 = 17.25

7 x 2.25 + 4 x 1.25 = 15.75 + 5 = 20.75

8 x 2.25 + 5 x 1.25 = 18 + 6.25 = 24.25

Therefore, Sidney played 5 games and rode 8 rides.

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Explain how to perform a​ two-sample z-test for the difference between two population means using independent samples with sigma
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Answer:

Step-by-step explanation:

In the two independent samples application, it involves the test of hypothesis that is the difference in population means, μ1 - μ2. The null hypothesis is always that there is no difference between groups with respect to means.

Null hypothesis: ∪₁ = ∪₂. where ∪₁ represent the mean of sample 1 and ∪₂ represent the mean of sample 2.

A researcher can hypothesize that the first mean is larger than the second (H1: μ1 > μ2 ), that the first mean is smaller than the second (H1: μ1 < μ2 ), or that the means are different (H1: μ1 ≠ μ2 ). These ae the alternative hypothesis.

Thus for the z test:

    if n₁ > 30 and n₂ > 30

     z = X₁ - X₂ / {Sp[√(1/n₁ + 1/n₂)]}

where Sp is √{ [(n₁-1)s₁² + (n₂-1)s₂²] / (n₁+n₂-2)}

5 0
2 years ago
You are a supervisor for a home cleaning business,
irinina [24]

Answer:

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Step-by-step explanation:

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8 0
2 years ago
How many cups are in a gallon
Digiron [165]
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6 0
2 years ago
Read 2 more answers
From experience, an airline knows that only 80% of the passengers booked for a certain flight actually show up. If 9 passengers
Olenka [21]

Answer:  0.74

Step-by-step explanation:

Given : The probability that the passengers booked for a certain flight actually show up : p=0.80

The number of passengers are randomly selected : n= 9

Binomial probability formula to find the probability of getting success in x trial :-

P(x)=^nC_xp^x(1-p)^{n-x}

Then , the probability that more than 6 of them show up will be :-

P(x>6)=P(7)+P(8)+P(9)\\\\=^9C_7(0.8)^7(0.2)^{2}+^9C_8(0.8)^8(0.2)^{1}+^9C_9(0.8)^9(0.2)^{0}\\\\=\dfrac{9!}{7!(9-7)!}(0.8)^7(0.2)^{2}+(9)(0.8)^8(0.2)+(1)(0.8)^9\approx0.3020+0.3020+0.1342=0.7382\approx0.74

Hence, the probability that more than 6 of them show up = 0.74

7 0
3 years ago
What is 34.75 - 0.876
Goryan [66]

Answer:

34.75 - 0.876 = 33.874

5 0
2 years ago
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