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4 years ago

20 POINTS!!! I need someone's help fast, like seriously fast!!

Mathematics

1 answer:

nasty-shy [4]4 years ago

5 0

Answer:

For the first one the value of X will be 3 and the second one the value of X will be 5.5

Step-by-step explanation:

All you're really doing for expressions like this are dividing the whole number into the number with the variable. for example, i took 5 and divided it into 15x which gave me 3 so the X will equal 3. Hope I helped

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GCF Of 112 and 54 With Work

AfilCa [17]

112
/ \
2 56
/ \
4 14
/ \ / \
2 2 2 7

54
/ \
2 27
/ \
3 9
/ \
3 3

GCF=2

8 0

3 years ago

Read 2 more answers

Use the null hypothesis H0 : μ = 98.6, alternative hypothesis Ha: μ < 98.6, and level of significance α = 0.05. 98 99.6 97.8

andrezito [222]

Answer:

The t-score is -1.8432

Step-by-step explanation:

We are given the following in the question:

98, 99.6, 97.8, 97.6, 98.7, 98.4, 98.9, 97.1, 99.2, 97.4, 99.1, 96.9, 98.8, 99.9, 96.8, 97, 98.7, 97.6, 98.7, 98.2

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{1964.4}{20} = 98.22$

Sum of squares of differences = 16.152

$s = \sqrt{\dfrac{16.152}{49}} = 0.922$

Population mean, μ = 98.6

Sample mean, $\bar{x}$ = 98.22

Sample size, n = 20

Sample standard deviation, s = 0.922

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 98.6\\H_A: \mu < 98.6$

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

$t_{stat} = \displaystyle\frac{98.22 - 98.6}{\frac{0.922}{\sqrt{20}} } = -1.8432$

The t-score is -1.8432

7 0

3 years ago

F(x) = 14 – 0.5x f(30)=

love history [14]

Answer: f(30) = -1

You would substitute every X with 30

3 0

3 years ago

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The price of a technology stock has dropped to $9.61 today. Yesterday's price was $9.72. Find the percentage decrease. Round you

Novay_Z [31]

Help me with mine pls

3 0

3 years ago

Help please & thank you so much

Alex787 [66]

D. probably im not that smart though but I hope this helps

5 0

3 years ago