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3 years ago

True or False. (1, – 7) is a solution to the following systems of equations.

Mathematics

1 answer:

Dennis_Churaev [7]3 years ago

6 0

Answer:

False

Step-by-step explanation:

Hope it helps

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Suzanne buys upgrades for her computer. The upgrades cost $311.60 before taxes. The sales tax rate is 6.75%. What is the amount

777dan777 [17]

Answer:

idk I need the answer too

Step-by-step explanation:

8 0

4 years ago

You are interested in the relationship between leisure activities and mood. One group of participants watches at least 2 hours o

Romashka [77]

Answer:

The most appropriate statistical test to use to compare the mood scores from the different groups is independent sample t-test.

Step-by-step explanation:

The Independent Samples t-test examines the means of two independent groups to see if statistical evidence exists to show that the related population means differ significantly.

The Independent Samples t-test is also known as Independent t-test, Independent Two-sample t-test, and among others.

It should be note that only two (and only two) groups can be compared using the Independent Samples t-test. It is not possible to use it to make comparisons between more than two groups.

Therefore, the most appropriate statistical test to use to compare the mood scores from the different groups is independent sample t-test.

3 0

3 years ago

If x-3 is a factor of x3+4x2+kx-30.Find the value of k.

Bogdan [553]

Answer:

k=-11

Step-by-step explanation:

$x^{3}+4x^{2}+kx-30$

if $x-3$ is a factor,

$(3)^{3}+4(3)^{2}+k(3)-30=0\\27+4*9+3k-30=0\\27+36+3k-30=0\\33+3k=0\\3k=-33\\k=-11$

3 0

3 years ago

When is translating algebraic expressions a useful tool

kolezko [41]

Answer:

This skill will come in handy when working with word problems or real life situations.

Step-by-step explanation:

6 0

3 years ago

a stock broker has kept a daily record of the value of a particular stock over the years and finds that the prices of the stock

Rainbow [258]

Answer:

The stock price beyond which 0.05 of the distribution fall is $12.44.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be 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.

Mean of $8.52 with a standard deviation of $2.38

This means that $\mu = 8.52, \sigma = 2.38$