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Irina-Kira [14]
2 years ago
14

You have been asked to rename one of the quadrilaterals (square, parallelogram, rectangle, rhombus, or trapezoid). Which quadril

ateral would you rename, and what would be its new name?
Mathematics
1 answer:
alexgriva [62]2 years ago
4 0

Answer:

I would rename the trapezoid. I would rename it a semi-hexagon, because it is basically half of a hexagon.

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A quality control specialist at a pencil manufacturer pulls a random sample of 45 pencils from the assembly line. The pencils ha
amm1812

Answer:

The P-value you would use to test the claim that the population mean of  pencils produced in that factory have a mean length equal to 18.0 cm is 0.00736.

Step-by-step explanation:

We are given that a quality control specialist at a pencil manufacturer pulls a random sample of 45 pencils from the assembly line.

The pencils have a mean length of  17.9 cm. Given that the population standard deviation is 0.25 cm.

Let \mu = <u><em>population mean length of  pencils produced in that factory.</em></u>

So, Null Hypothesis, H_0 : \mu = 18.0 cm     {means that the population mean of  pencils produced in that factory have a mean length equal to 18.0 cm}

Alternate Hypothesis, H_A : \mu\neq 18.0 cm     {means that the population mean of  pencils produced in that factory have a mean length different from 18.0 cm}

The test statistics that will be used here is <u>One-sample z-test</u> statistics because we know about the population standard deviation;

                           T.S.  =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean length of pencils = 17.9 cm

           \sigma = population standard deviation = 0.25 cm

           n = sample of pencils = 45

So, <u><em>the test statistics</em></u> =  \frac{17.9-18.0}{\frac{0.25}{\sqrt{45} } }  

                                    =  -2.68

The value of z-test statistics is -2.68.

<u>Now, the P-value of the test statistics is given by;</u>

         P-value = P(Z < -2.68) = 1 - P(Z \leq 2.68)

                      = 1- 0.99632 = 0.00368

For the two-tailed test, the P-value is calculated as = 2 \times 0.00368 = 0.00736.

7 0
3 years ago
Explain why this means that 251/2=5
8_murik_8 [283]
It’s 251 divided by 2 equals 5
7 0
2 years ago
Read 2 more answers
7x-3x-8=24 what is the value of x
Ann [662]

<u><em>Answer: x=8 and 8=x. *The answer must be have positive sign.*</em></u>

Step-by-step explanation:

addition property of equality is adding the same number to both sides of an equation does not change the equation.

a+c=b+c

distributive property: a(b+c)=ab+ac

add the numbers.

7x-3x=4x

4x-8=24

add by 8 both sides of an equation.

4x-8+8=24+8

simplify by equation.

24+8=32

4x=32

divide by 4 both sides of an equation.

4x/4=32/4

simplify by equation.

32/4=8

32/8=4

8*4=32

4*8=32

It change negative to positive.

x=8 and 8=x

Hope this helps!

Thanks!

Have a great day!

5 0
3 years ago
Read 2 more answers
Robyn is baking pies she needs 2 cups of flour for each pies she has 8 cups of flour she uses all 8 cups of flour
aksik [14]
Robyn bakes 4 pies because if she has 8 total cups of flour and each pie needs 2 cups of flour then all you need to do its divide. Hope this made sense and helped.
6 0
3 years ago
Tara saved $90.75 in 3 months. She saved $39.95 in the first month and $1.95 in the second month. How much money did Tara save i
den301095 [7]
To answer this question we need to add 39.95+1.95=41.9
Then just subtract: 90.75-41.9=48.85

The answer is 48.85. 

Hope this helps! If it does, please rate, thank, and if it really helped give brainliest! Thanks! :)
5 0
3 years ago
Read 2 more answers
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