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Ganezh [65]
2 years ago
10

What is the value of X

Mathematics
1 answer:
vodomira [7]2 years ago
7 0

Answer:

The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown". In x + 2 = 7, x is a variable, but we can work out its value if we try!

Step-by-step explanation:

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What is the measure of angle x?
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43

Step-by-step explanation:

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X = -60i + 80<br> What is the real part of Z? What is the imaginary part of Z?
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Answer:

the real part is 80

the imaginary part is -60

Step-by-step explanation:

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The graph of f(x)=x2 was transformed to create the graph of g(x)=(x+5)2.
alexandr1967 [171]

Answer:

a horizontal shift left

Step-by-step explanation:

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5 0
2 years ago
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.

6 0
2 years ago
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