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motikmotik
4 years ago
11

BRAINLIST GIVEN What is the length of BC¯¯¯¯¯ ?

Mathematics
2 answers:
kodGreya [7K]4 years ago
8 0

The angles at the base are the same measure. Hence, this is an isosceles triangle |AC| = |AB|.

Therefore we have the equation:

2x-24=x-2            <em>add 24 to both sides</em>

2x=x+22            <em>subtract x from both sides</em>

\boxed{x=22}

<h3>Answer: |BC| = 22</h3>
Temka [501]4 years ago
6 0

since the ∡C = ∡B, that means their corresponding sides stemming from the vertex A are equal, namely AC = AB.

2x - 24 = x - 2

x = 22.

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The seventh-grade spring class trip will either be to a zoo or an art museum. Which survey
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D. survey those seventh-grade students who participated in this year’s art fair

Step-by-step explanation:

The people who participated in the art fair will most likely want to go to the art museum, which is a biased result.

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While her husband spent 2½ hours picking out new speakers, a statistician decided to determine whether the percent of men who en
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Answer:

z=\frac{p_{M}-p_{W}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{M}}+\frac{1}{n_{W}})}}   (1)

z=\frac{0.34848-0.34782}{\sqrt{0.34831(1-0.34831)(\frac{1}{66}+\frac{1}{23})}}=0.0057  

p_v =P(Z>0.0057)=0.4977  

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Step-by-step explanation:

1) Data given and notation  

X_{M}=23 represent the number of men that said they enjoyed the activity of Saturday afternoon shopping

X_{W}=8 represent the number of women that said they enjoyed the activity of Saturday afternoon shopping

n_{M}=66 sample of male selected

n_{W}=23 sample of demale selected

p_{M}=\frac{23}{66}=0.34848 represent the proportion of men that said they enjoyed the activity of Saturday afternoon shopping

p_{W}=\frac{8}{23}=0.34782 represent the proportion of women with red/green color blindness  

z would represent the statistic (variable of interest)  

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

2) Concepts and formulas to use  

We need to conduct a hypothesis in order to check if the percent of men who enjoy shopping for electronic equipment is higher than the percent of women who enjoy shopping for electronic equipment , the system of hypothesis would be:  

Null hypothesis:p_{M} \leq p_{W}  

Alternative hypothesis:p_{M} > p_{W}  

We need to apply a z test to compare proportions, and the statistic is given by:  

z=\frac{p_{M}-p_{W}}{\sqrt{\hat p (1-\hat p)(\frac{1}{n_{M}}+\frac{1}{n_{W}})}}   (1)

Where \hat p=\frac{X_{M}+X_{W}}{n_{M}+n_{W}}=\frac{23+8}{66+23}=0.34831

3) Calculate the statistic

Replacing in formula (1) the values obtained we got this:  

z=\frac{0.34848-0.34782}{\sqrt{0.34831(1-0.34831)(\frac{1}{66}+\frac{1}{23})}}=0.0057  

4) Statistical decision

Using the significance level provided \alpha=0.05, the next step would be calculate the p value for this test.  

Since is a one side right tail test the p value would be:  

p_v =P(Z>0.0057)=0.4977  

So the p value is a very high value and using the significance level \alpha=0.05 we see that p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can say the the percent of men who enjoy shopping for electronic equipment is NOT significantly higher than the percent of women who enjoy shopping for electronic equipment.  

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19. Find the AREA of a circle with a DIAMETER of 6 inches.
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Answer:

a. 28.26 square in.

Step-by-step explanation:

diameter= 6 inches

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Area of circle:

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=3.14×3²

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3 years ago
Hey can you help me fast!!
Maksim231197 [3]

Answer: 12

Step-by-step explanation:

2.93/.25=11.72 round up to 12

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