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3 years ago

Choose all true statements.

Mathematics

2 answers:

gogolik [260]3 years ago

6 0

Answer:

B. Some rational numbers are natural numbers.

D. All whole numbers are integers.

E. Some integers are natural numbers.

Step-by-step explanation:

serious [3.7K]3 years ago

3 0

Answer:

Some rational numbers are natural numbers

All whole numbers are integers

Some integers are natural numbers.

Step-by-step explanation:

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Solve for x: -4x – 12 > 36 A. x > -12 B. x > 12 C. x < -12 D. x < 12

Nataliya [291]

Answer: x < -12

Step-by-step explanation:

-4x – 12 > 36

4x > 36+ 12

-4 > 48

x < -48/4

x < -12

Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! As well as a great rest of Black History Month! :-)

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2 years ago

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What is the slope of a line that passes through (–12,15) and (0,4)?

Romashka [77]

I think that the answer is negative 11 over 12

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2 years ago

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A metal bar weighs 7 Kg. 93% of the bar is Silver. How many Kgs of silver is there in the bar?

Sindrei [870]

<h3>Solution:</h3>

<u>From the given data</u>

<u>93% of the bar is silver :</u>

$\small\bold{ → 93\% \: \: of \: \: 7kg}$

$\small \bold{→\frac{93}{100} \times 7 }$

$\small \bold{→ \frac{651}{100} }$

$\small \bold{→ 6.51 \: kg }$

<u>Therefore, 6.51 Kg of Silver is there in the bar.</u>

8 0

1 year ago

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Helen spent $145 for shoes. This was $55 more than twice what she spent for a bag. How much was the bag?

marin [14]

Answer:

45 DOLLARS

Step-by-step explanation:

For these kind of problems, write an equation to figure out the answer.

55 + 2x = 145

x represents the bag cost

145 is the shoe cost

Take out the constant, which is 55, from both sides. A constant is a useful term you should learn.

The result is: 2x = 90

Divide 2x by 2, to get x, which is the bag cost, by itself.

Result: x= 45

Since x is the bag cost, the bag costs 45 dollars

Please mark me brainliest

8 0

3 years ago

According to a recent survey, the population distribution of number of years of education for self-employed individuals in a c

creativ13 [48]

Answer:

a) X: number of years of education

b) Sample mean = 13.5, Sample standard deviation = 0.4

c) Sample mean = 13.5, Sample standard deviation = 0.2

d) Decrease the sample standard deviation

Step-by-step explanation:

We are given the following in the question:

Mean, μ = 13.5 years

Standard deviation,σ = 2.8 years

a) random variable X

X: number of years of education

Central limit theorem:

If large random samples are drawn from population with mean $\mu$ and standard deviation $\sigma$ , then the distribution of sample mean will be normally distributed with mean $\mu$ and standard deviation $\frac{\sigma}{\sqrt{n}}$

b) mean and the standard for a random sample of size 49

$\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{49}} = 0.4$

c) mean and the standard for a random sample of size 196

$\mu_{\bar{x}} = \mu = 13.5\\\\\sigma_{\bar{x}} = \dfrac{\sigma}{\sqrt{n}} = \dfrac{2.8}{\sqrt{196}} = 0.2$

d) Effect of increasing n

As the sample size increases, the standard error that is the sample standard deviation decreases. Thus, quadrupling sample size will half the standard deviation.

7 0

3 years ago