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3 years ago

Is there a multiple of 3? And why not or why yes?

Mathematics

2 answers:

MaRussiya [10]3 years ago

7 0

Yes you can with lots of numbers except for 1 and 0 :)

rodikova [14]3 years ago

6 0

Yes there is because u can multiply it by different numbers except for 1 and 0

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Which expressions are equivalent to Negative 9 (two-thirds x + 1)? Check all that apply.

Sav [38]

Answer:

$-9(\frac{2}{3}x) + 9(1)\\ \\-6x + 9$

Explanation:

Before we begin, remember the following rules:

1- Distribution property:

$a(b+c) = ab+ac$

2- Simplification of fractions:

$\frac{xy}{yz}=\frac{x}{z}$

3- Signs in multiplication:

+ve * +ve = +ve

-ve * -ve = +ve

+ve * -ve = -ve

Now, for the given problem, we have:

$9 (\frac{2}{3}x + 1)$

Starting with the distributive property:

$-9 (\frac{2}{3}x +1) = -9(\frac{2}{3}x) - (-9)(1) = -9(\frac{2}{3}x) + 9(1)$

..................>This corresponds to option 1

Now, we simplify the output from the above step:

$-9(\frac{2}{3}x) + 9 = \frac{-9*2}{3}x + 9 = -6x+9$

................> This corresponds to option 5

Hope this helps :)

4 0

3 years ago

Read 2 more answers

A simple random sample of size nequals15 is drawn from a population that is normally distributed. The sample mean is found to be

Bond [772]

Answer with explanation:

To test the Significance of the population which is Normally Distributed we will use the following Formula Called Z test

$z=\frac{\Bar X - \mu}{\frac{\sigma}{n}}$

$\Bar X =31.1\\\\ \sigma=6.3\\\\ \mu=25\\\\n=15\\\\z=\frac{31.1-25}{\frac{6.3}{\sqrt{15}}}\\\\z=\frac{6.1\times\sqrt{15}}{6.3}\\\\z=\frac{6.1 \times 3.88}{6.3}\\\\z=3.756$

→p(Probability) Value when ,z=3.756 is equal to= 0.99992=0.9999

⇒Significance Level (α)=0.01

We will do Hypothesis testing to check whether population mean is different from 25 at the alpha equals 0.01 level of significance.

→0.9999 > 0.01

→p value > α

With a z value of 3.75, it is only 3.75% chance that ,mean will be different from 25.

So,we conclude that results are not significant.So,at 0.01 level of significance population mean will not be different from 25.

3 0

3 years ago

A recipe includes 8 cups of flour and 2/3 third cups of sugar right the ratio of the amount of flour to the amount of sugar as a

Art [367]

Its 8:2/3, we can write it as $\frac{8}{ \frac{2}{3} } =8 *\frac{3}{2} = \frac{8*3}{2} = \frac{24}{2}= \frac{12}{1}$
Now we can back to 12:1 - its the result

5 0

3 years ago

1/3(x+6) = 2/3(x-9) help please

Y_Kistochka [10]

Answer:

x = 1/24

Step-by-step explanation:

6 0

3 years ago

It takes an ant farm 3 days to consume 1 half of an apple at that rate in how many days will the ant farm consume 3 apples

Snezhnost [94]

It would take 6 days to consume a whole apple, so you multiply 6 by 3 to get your answer, 18 days :D

5 0

3 years ago