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2 years ago

Solve the inequality for x, assuming that a, b, and c are positive constants.

1 answer:

4 0

A(bx − c) ≥ bc, implies (bx − c) ≥ bc /a and then bx ≥ bc/a + c, x≥ c/a +c/b
so the solution is 3. [c/a + c/b, infinity)

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Each Friday, the school prints 400 copies of the school newsletter. The equation c = 400w models the relationship between the nu

Darya [45]

AnswER

THE SECOND ONE IS ANY WHOLE NUMBER I JUST TOOK THE QUIZ

Step-by-step explanation:

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2 years ago

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How much heat is required to raise the temperature of

Elina [12.6K]

Answer:

The amount of heat required to raise the temperature of liquid water is 9605 kilo joule .

Step-by-step explanation:

Given as :

The mass of liquid water = 50 g

The initial temperature = $T_1$ = 15°c

The final temperature = $T_2$ = 100°c

The latent heat of vaporization of water = 2260.0 J/g

Let The amount of heat required to raise temperature = Q Joule

Now, From method

Heat = mass × latent heat × change in temperature

Or, Q = m × s × ΔT

or, Q = m × s × ( $T_2$ - $T_1$ )

So, Q = 50 g × 2260.0 J/g × ( 100°c - 15°c )

Or, Q = 50 g × 2260.0 J/g × 85°c

∴ Q = 9,605,000 joule

Or, Q = 9,605 × 10³ joule

Or, Q = 9605 kilo joule

Hence The amount of heat required to raise the temperature of liquid water is 9605 kilo joule . Answer

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2 years ago

The following data represent weights (pounds) of a random sample of professional football players on the following teams. X1 = w

alexandr1967 [171]

I don't have an idea of what the answer is to be honest.

8 0

1 year ago

he following data set shows the number of dogs counted in a local park each Saturday for 4 months. 33, 36, 31, 37, 37, 38, 31, 3

lana66690 [7]

General Idea:

To create a dot plot for a set of data we should list the data from lowest to greatest number. Then create a number line which covers all the numbers given in the data. We need to plot number of circles one above as many times based on the frequency of the data.

Applying the concept:

33, 36, 31, 37, 37, 38, 31, 37, 35, 31, 38, 32, 36, 33, 38

Listing the data in ascending order we get

31, 31, 31, 32, 33, 33, 35, 36, 36, 37, 37, 37, 38, 38, 38

We need to plot three circles above 31, one circle above 32, two circles above 33, one above 35, two above 36, three above 37, and three above 38.

Conclusion:

Out of the four options, the correct option is B because that is the only dot plot representing the given set of data.

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2 years ago

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The Boston public school district has had difficulty maintaining on-time bus service for its students ("A Year Later, School Bus

zheka24 [161]

Answer:

$z=\frac{8-12}{\frac{12}{\sqrt{36}}}=-2$

C. z=-2.00

Step-by-step explanation:

Data given and notation

$\bar X=8$ represent the sample mean

$\sigma=12$ represent the population standard deviation

$n=36$ sample size

$\mu_o =12$ represent the value that we want to test

$\alpha$ represent the significance level for the hypothesis test.

t would represent the statistic (variable of interest)

$p_v$ represent the p value for the test (variable of interest)

State the null and alternative hypotheses.

We need to conduct a hypothesis in order to check if the ture mean is equal to 12 or no, the system of hypothesis would be:

Null hypothesis: $\mu =12$

Alternative hypothesis: $\mu \neq 12$

If we analyze the size for the sample is > 30 and know the population deviation so is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

z-test: "Is used to compare group means. Is one of the most common tests and is used to determine if the mean is (higher, less or not equal) to an specified value".

Calculate the statistic

We can replace in formula (1) the info given like this:

$z=\frac{8-12}{\frac{12}{\sqrt{36}}}=-2$

C. z=-2.00

8 0

2 years ago