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2 years ago

{(1, 2), (2, 3), (3, 4), (4, 5)} is this a function and why?

Mathematics

2 answers:

nevsk [136]2 years ago

8 0

It is a function because the x does not repeat

Andrews [41]2 years ago

7 0

This is a function. Each x value corresponds to exactly one y value. ( x's did not repeat)

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What are the little numbers in a math equation called

Alborosie

Answer:

Exponents

Step-by-step explanation:

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2 years ago

It is believed that a stock price for a particular company will grow at a rate of $5 per week with a standard deviation of $1. A

IgorLugansk [536]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = $5

For the alternative hypothesis,

µ < $5

number of samples taken = 10

Sample mean, x = (4 + 3 + 2 + 3 + 1 + 7 + 2 + 1 + 1 + 2)/10 = 2.6

To determine sample standard deviation, s

s = √(summation(x - mean)/n

n = 12

Summation(x - mean) = (4 - 2.6)^2 + (3 - 2.6)^2 + (2 - 2.6)^2 + (3 - 2.6)^2 + (1 - 2.6)^2 + (7 - 2.6)^2 + (2 - 2.6)^2 + (1 - 2.6)^2 + (1 - 2.6)^2 + (2 - 2.6)^2 = 30.4

s = √30.4/10 = 1.74

Since the number of samples is 10 and no population standard deviation is given, the distribution is a student's t.

Since n = 10,

Degrees of freedom, df = n - 1 = 10 - 1 = 9

t = (x - µ)/(s/√n)

Where

x = sample mean = 2.6

µ = population mean = 5

s = samples standard deviation = 1.74

t = (2.6 - 5)/(1.74/√10) = - 4.36

We would determine the p value at alpha = 0.05. using the t test calculator. It becomes

p = 0.000912

7 0

2 years ago

2 numbers have to be a fraction and to numbers have to be an equivalent decimal the 4 numbers are 6,5,2,1

Zielflug [23.3K]

Answer:

Fraction = 6/5 and decimal = 1.2.

Step-by-step explanation:

We have 6/5 :

Divide 6 by 5 gives us 1 1/5 = 1.2.

4 0

3 years ago

I need asap I will mark you brainlist please help me

erma4kov [3.2K]

Answer:

1:94 2:-94

Step-by-step explanation:

first one you take 53--41 its 94 and then you take -41-53 and that gets you -94

8 0

3 years ago

Read 2 more answers

In the picture shown below, what proportion would NOT give the correct value of x?

Temka [501]

Answer: (c)

Step-by-step explanation:

In the given figure, two triangles are similar namely $\triangle ABC$ and $\triangle ADB$

For similar triangles, the ratio of the corresponding sides are equal.

For option (a), Hypotenuse to Perpendicular ratio is given, that is correct

Similarly for option (b), Perpendicular to hypotenuse ratio is given

Both option (a) and (b) gives the same value of $x$ that is,

$\Rightarrow x=\sqrt{81\times 45}\\\Rightarrow x=60.37$

Option (c) does not give the correct value of $x$

7 0

2 years ago

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