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2 years ago

what is the slope of the line that passes thought the points (4,-6) and (-2,3)? write your answer on simplest form.

Mathematics

1 answer:

Wittaler [7]2 years ago

5 0

Step-by-step explanation:

$\frac{y - y0}{x - x0} \\ \frac{ - 6 - 3}{ 4 + 2} \\ - \frac{9}{6} = - \frac{3}{2} = 1.5$

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Consider the accompanying data on flexural strength (MPa) for concrete beams of a certain type.

Vinvika [58]

Answer:

The point estimate for population mean is 8.129 Mpa.

Step-by-step explanation:

We are given the following in the question:

Data on flexural strength(MPa) for concrete beams of a certain type:

11.8, 7.7, 6.5, 6.8, 9.7, 6.8, 7.3, 7.9, 9.7, 8.7, 8.1, 8.5, 6.3, 7.0, 7.3, 7.4, 5.3, 9.0, 8.1, 11.3, 6.3, 7.2, 7.7, 7.8, 11.6, 10.7, 7.0

a) Point estimate of the mean value of strength for the conceptual population of all beams manufactured

We use the sample mean, $\bar{x}$ as the point estimate for population mean.

Formula:

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

$\bar{x} = \dfrac{\sum x_i}{n} = \dfrac{219.5}{27} = 8.129$

Thus, the point estimate for population mean is 8.129 Mpa.

4 0

3 years ago

Suppose y varies directly with x. If y = –4 when x = 8, what is the equation of direct variation? Complete the steps to write th

rosijanka [135]

Direct variation is of the form y=kx. We are given the point (8, -4) so we can solve for k, the constant of variation...

-4=8k, divide both sides by 8

-4/8=k

k=-0.5, so our equation is:

y=-0.5x,

5 0

4 years ago

Read 2 more answers

When stating the null and alternative hypotheses, the hypotheses are: Select one: a. Always about the statistic only b. Always a

Nata [24]

Answer:

D. Always about the parameter only

Step-by-step explanation: A Null Hypothesis is a hypothesis used in statistics to show that there is no variation among the variables of interest. A Null Hypothesis also can be said to be giving a proposal that there is not significant difference between the observed data.

An alternative hypothesis is a hypothesis in statistics given contrary to the Null Hypothesis,a Null hypothesis can also be seen in statistics as stating that something is happening among the data.

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3 years ago

-3 – 5x - 5y + 8x + 7y + 8

Scilla [17]

Answer: -14y

Step-by-step explanation:

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3 years ago

What is the area of the figure below?

FinnZ [79.3K]

Answer:

the area is 21

Step-by-step explanation:

3 0

3 years ago

what is the slope of the line that passes thought the points (4,-6) and (-2,3)? write your answer on simplest form.​

what is the slope of the line that passes thought the points (4,-6) and (-2,3)? write your answer on simplest form.