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yanalaym [24]
3 years ago
9

Solve and show work

Mathematics
1 answer:
Alika [10]3 years ago
6 0
84 gallons/(2.8 gpm) = 30 minutes
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A math teacher claims that she has developed a review course that increases the scores of students on the math portion of a coll
xxMikexx [17]

Answer: D

H0: μ=522

H1: μ>522

Step-by-step explanation:

The null hypothesis (H0) tries to show that no significant variation exists between variables or that a single variable is no different than its mean. While an alternative Hypothesis (Ha) attempt to prove that a new theory is true rather than the old one. That a variable is significantly different from the mean.

So, for this case;

The null hypothesis is that the mean score equals to 522

H0: μ=522

The alternative hypothesis is that the mean score is greater than 522.

H1: μ>522

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3 years ago
Pretty Pavers company is installing a driveway. Below is a diagram of the driveway they are
Zina [86]

Answer: The answer is 190 square feet

Step-by-step explanation:

I just answered the same question

3 0
3 years ago
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A videotape store has an average weekly gross of $1,158 with a standard deviation of $120. Let x be the store's gross during a r
statuscvo [17]

Answer:

The number of standard deviations from $1,158 to $1,360 is 1.68.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 1158, \sigma = 120

The number of standard deviations from $1,158 to $1,360 is:

This is Z when X = 1360. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{1360 - 1158}{120}

Z = 1.68

The number of standard deviations from $1,158 to $1,360 is 1.68.

3 0
3 years ago
Write a function (equation) that can be used to find the relationship between x and y.
Andreas93 [3]
I think it would be y = -3x +2
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3 years ago
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Please help me with this please
Jlenok [28]

Answer:

21

Step-by-step explanation

3 Units x 7 Units = 21 Square Units

7 0
3 years ago
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