3 years ago

Can somebody solve this

Mathematics

1 answer:

Nikolay [14]3 years ago

8 0

Answer:

Step-by-step explanation:

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Choose the equation below that represents the line that passes through the point (-2, -1) and has a slope of 5.

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Hello,
y+1=5(x+2)
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Tell whether the number is evenly divisible by 2, 3, 4, or 9.

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1.Show that the points (5,5),(6,4),(-2,4) and (7,1) are concyclic .Also find the equation ,centre and radius of the circle on wh

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(5,5),(6,4),(-2,4) and (7,1)

Step-by-step explanation:

are concyclic

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A store manager reduces the price of a sweater by $6 due to a slight damage. This represents a 15% reduction. What is the reduce

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Answer:

The price of the sweater originally was $40.

After reducing it $6, it is now $34.

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15% = .15

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3 years ago

In a study of 11,000 car crashes, it was found that 5720 of them occurred within 5 miles of home. Use a .05 significance level t

ki77a [65]

Answer:

Claim is true

Step-by-step explanation:

n = 11000

x = 5720

Claim : more than 50% of car crashes occur within 5 miles of home.

$H_0:p=0.5\\H_a:p>0.5$

We will use one sample proportion test

$\widehat{p}=\frac{x}{n}\\\widehat{p}=\frac{5720}{11000}\\\widehat{p}=0.52$

Formula of test statistic = $\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}$

= $\frac{0.52-0.5}{\sqrt{\frac{0.5(1-0.5)}{11000}}}$

=4.19

Significance level = 0.05

z at 0.05 = 1.64

Since calculated z > defined z

So, null hypothesis is rejected

Hence the claim is true that 50% of car crashes occur within 5 miles of home.

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3 years ago