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2 years ago

Click on a factor pair of 12 2 and 3 3 and 4 6 and 7 2 and 4

Mathematics

2 answers:

Strike441 [17]2 years ago

7 0

3 and 4! Because 3x4=12 and 4x3= 12! Mark me brainliest so I can help more people !

IRINA_888 [86]2 years ago

3 0

3 and 4
If you multiply 3*4= 12 and 4*3=12

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On day 1 of a savings challenge $7 was deposited. On day 8 $56 is deposited. What could be an ordered pair for this scenario?

miv72 [106K]

An ordered pair for this scenario would be 7

8 0

2 years ago

Suppose that the researchers wanted to estimate the mean reaction time to within 6 msec with 95% confidence. Using the sample st

Lisa [10]

Answer:

a) The 95% confidence interval would be given by (509.592;550.308)

b) n=523 rounded up to the nearest integer

Step-by-step explanation:

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=530$ represent the sample mean for the sample

$\mu$ population mean

s=70 represent the sample standard deviation

n=48 represent the sample size (variable of interest)

Confidence =95% or 0.995

Part a

The confidence interval for the mean is given by the following formula:

$\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}$ (1)

The degrees of freedom are df=n-1=48-1=47

Since the Confidence is 0.95 or 95%, the value of $\alpha=0.05$ and $\alpha/2 =0.025$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.025,47)".And we see that $z_{\alpha/2}=2.01$

Now we have everything in order to replace into formula (1):

$530-2.01\frac{70}{\sqrt{48}}=509.692$

$530+2.01\frac{70}{\sqrt{48}}=550.308$

So on this case the 95% confidence interval would be given by (509.592;550.308)

Part b

The margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

Assuming that $\hat \sigma =s$

And on this case we have that ME =6msec, and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 95% of confidence interval is provided, $z_{\alpha/2}=1.96$ , replacing into formula (b) we got:

$n=(\frac{1.96(70)}{6})^2 =522.88 \approx 523$

So the answer for this case would be n=523 rounded up to the nearest integer

3 0

2 years ago

W=5, X=3, Y=4, Z=8<br><br> X(to the second power) + 4W-2Y (divided by) Z

Virty [35]

Answer:

If you're looking for a number solution it's 28

Step-by-step explanation:

3^2+4(5)-2(4)/8

9+20-1

29-1

7 0

2 years ago

If all squares are rectangles, and if all rectangles are parallelograms, then all squares are parallelograms. Which law of prope

xxMikexx [17]

Symmetric property, I remembered the answer for this for my summer school. This is one of the equivalence properties of equality.

7 0

2 years ago

. Write the following expression in factored form using the greatest common factor.<br> 50a3 + 10a2

Tanya [424]

The factors of 50a³ are 1, 2, 5, 10, 25, 50,
   and their products with a, a² and a³ .

The factors of 10a² are 1, 2, 5, 10,
    and their products with 'a' and a² .

Their common factors are 1, 2, 5, 10,
   and their products with 'a' and a².

Their greatest common factor is 10a² .

(Another way to spot it, easily, is to remember this helpful factoid:

   If the smaller number is a factor of the larger number,
   then the smaller number is their greatest common factor.

Using the greatest common factor, then . . .

   50a³ + 10a² =   10a²(5a + 1) .

3 0

2 years ago