3 years ago

Fifteen is added to the product of a number and 6. the result is 9. find the number.

Mathematics

1 answer:

e-lub [12.9K]3 years ago

6 0

Equation: 9= 15+(x•6)

answer: x= -1

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7. A number of minor automobile accidents occur at various high-risk intersections in Teton County despite traffic lights. The T

Anit [1.1K]

Answer:

Modification has not reduced the number of accidents.

Step-by-step explanation:

$H_0: \mu\geq0\\H_a:\mu$

A B C D E F G H

Before modification 5 7 6 4 8 9 8 10

After modification 3 7 7 0 4 6 8 2

Difference -2 0 1 -4 -4 -3 0 -8

Mean of differences $M_d = \frac{sum}{8}=\frac{2+0-1+4+4+3-0+8}{8}=2.5$

Standard deviation of differences = $\sqrt{\frac{\sum(x-\bar{x})^2}{n}}=2.9277$

Formula of paired t test :

$t=\frac{M_d}{\frac{s}{\sqrt{n}}}\\t=\frac{2.5}{\frac{2.9277}{\sqrt{8}}}\\t = 2.4152$

Df = n-1 = 8-1 =7

$t critical = t_{(df, \alpha)}=t_{7,0.01}=2.998$

t critical> t calculated

So, We failed to reject null hypothesis

Hence modification has not reduced the number of accidents.

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3 years ago

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Alex Ar [27]

Answer:

I have given the answer

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3 years ago

Mary catherine made 4 gallons of punch for her party how many cups of punch did she make

zhenek [66]

Answer:

64 cups

Step-by-step explanation:

1 gallon is equivalent to 16 cups

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GenaCL600 [577]

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3 years ago

What is the answer to 6+5(9 divided by 3)2

Wittaler [7]

6+5(9/3)2
6+5(3)2
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11+6
17

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3 years ago

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