which expression is true​

Answer: The first 3 are functions. The last one is not a function

Step-by-step explanation: What you can do is the line test. If you draw a line through it, the line shouldn't touch the arrow twice. Like the last one, it touches the line twice, so it is not a function

Answer:

34.57 I'm pretty sure yayyy

Answer:

34.567 rounded to tenths is 34.6

Step-by-step explanation:

because if you look at the number to the right it five or more so you raise the score and the five turns to a 6 so 34.567 = 34.6

Question 1

[tex]649+n=700+27\\ \\649+n=727\\ \\ n=\boxed{78}[/tex]

Question 2

[tex]295-38=n-24\\\\257=n-24\\\\n=\boxed{281}[/tex]

Answer:

x = 1, y = 4

Step-by-step explanation:

Given

(2x + 3) + i(x - 2y) = 5 - 7i

Equate the real parts on both sides

2x + 3 = 5 ( subtract 3 from both sides )

2x = 2 ( divide both sides by 2 )

x = 1

Equate the coefficients of the imaginary terms

x - 2y = - 7 , that is

1 - 2y = - 7 ( subtract 1 from both sides )

- 2y = - 8 ( divide both sides by - 4 )

y = 4

Answer: 0.375

Step-by-step explanation:

Given: The difference between actual and predicted weekly sales of a company follows a uniform distribution between -$4000 and $4000.

Probability density function: [tex]f(x)=\dfrac{1}{b-a}=\dfrac{1}{4000-(-4000)}=\dfrac{1}{8000}[/tex]

The probability that the actual sale is within $1500 of the predicted sale = [tex]\int^{1500}_{-1500}f(x)dx=\int^{1500}_{-1500}\dfrac{1}{8000}dx=\dfrac{1}{8000}[x]^{1500}_{-1500}\\\\= \dfrac{1}{8000}(1500-(-1500))\\\\= \dfrac{1}{8000}(3000)=0.375[/tex]

Hence, Required probability =0.375

Answer:

Step-by-step explanation:

Mean μ = 36

standard deviation σ = 10

n = 16

standard deviation of the group σ₁ = σ / √n

σ₁ = 10/ √16

= 10 / 4 = 2.5

σ₁  = 2.5

P ( x > 35 ) = 1 - P ( x < 35 )

P ( x < 35 ) = P( z < (35 - 36) / 2.5 ) = P( z < (35 - 36) / 2.5 )

= P( z < 0.4  )

= .3446

P ( x > 35 ) = 1 - .3446

= .6554 .

Answer:

4.23 rounded to the nearest whole number is 4.

Answer:

4.23 2.115 per item

Step-by-step explanation:

Answer:

Step-by-step explanation:

The value X° where x is non zero number will give a value of 1 because any value raise to the power of zero gives 1.

For example if X = 2, 2° = 1

For the expression 0^x, this will result into zero for any positive power of x. Let x be 3 for example,

0³ = 0×0×0

0³ = 0

Also if x = 4

0⁴ = 0×0×0×0 = 0

Therefore, no matter the value of x, rge value 0^x will return back zero.

For 0^0 this value is an indeterminate function i.e we cannot determine the the value. The value cannot return Amy positive or negative real number on the number line. Hence 0^0 is indeterminate.

Answer:

you could stay there 6 nights

Step-by-step explanation:

to solve this you would do 825$ ÷ by the amout which is 134$ and then you get 6.15671641791 then you would round it which give you 6 nights.

Answer: The domain is all of the possible values for the input (x) axis.  The range is the possible values for the output (y).

Step-by-step explanation: You will have to subtract the least value from the greatest value for both your x and y.

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[tex]x \leqslant cy + D[/tex]

Subtract sides D

[tex]x - D \leqslant cy + D - D[/tex]

[tex]x - D \leqslant cy[/tex]

Divide sides by c

[tex] \frac{x - D }{c} \leqslant \frac{cy}{c} \\ [/tex]

[tex] \frac{x -D}{c} \leqslant y \\ [/tex]

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Answer: 4

Step-by-step explanation: Brainliest plz!!

Answer:

The absolute change would be 3 percentage points.

The relative change would be 100%

Step-by-step explanation:

Q: -10x-(-4)=14

A: x=-1

Process:

-Subtracting a negative is just like adding 10x+4=14

-Subtract 4 from both sides -10x=10

Divide -10 from both sides x=-1

Answer:

The mean and variance of X are 2.82 and 0.1692  respectively

Step-by-step explanation:

The binomial distribution is a discrete probability distribution that tells the percentage in which a result is likely to be obtained between two possibilities when performing n number of tests. In other words, a binomial distribution is a discrete probability distribution that describes the number of successes when conducting n independent experiments on a random variable.

In a binomial distribution, the mean indicates the mean value of a random phenomenon. It is calculated by:

μ=n*p

Where:

This case is a binomial distribution, where n = 3 and p = 0.94. Then:

μ=3*0.94

μ=2.82

The mean of X is 2.82.

Variance is a measure of dispersion that represents the variability of a data series with respect to its mean. It is calculated by:

Var[X]= n*p*q

Where:

Remembering that the random variable X expresses the number of successes obtained when performing "n" independent Bernouilli tests or tests with probability "p" of success and "(1-p)" of failure, then q = 1-p.

So:

Var[X]= n*p*(1-p)

In this case:

Var[X]=3*0.94*(1-0.94)

Var[X]=3*0.94*0.06

Var[X]=0.1692

The variance of X is 0.1692

Answer: 1.54

Step-by-step explanation:

Given that :

Z = normal random variable

Area to the left of z = 0.9382

For a random normal distribution ;

P(Z < x) = 0.9382

Using the Z table (standard normal distribution table) ;

Locating the probability value (0.9382) on the table and picking the intersecting z value both horizontally and vertically :

Horizontal value = 1.5

Vertical value = 0.04

Horizontal + vertical = (1.5 + 0.04) = 1.54

Answer: Use the graph of the line to answer the questions.

What is an equation of the line in point-slope form?

✔ y + 1 = (1/3)(x + 2)

How can the point-slope form be written in function notation?

✔ f(x) = (1/3)x – (1

Answer:-1

Step-by-step explanation: It’s seen as a pattern going back and forth between a few answers.

Answer:

It's -1.

Step-by-step explanation:

i has no value but if you multiply it by itself 30 times you get -1. Imaginary numbers are great, I know.

The answer is number 4. x=1 x=2 x=-2

Complete Question

A random sample of 114 observations produced a sample mean of 30. Find the critical and observed values of z for the following test of hypothesis using α=0.01. The population standard deviation is known to be 5 and the population distribution is normal.

[tex]H_o: \mu =28[/tex]  versus H1: μ>28.

Round your answers to two decimal places.

[tex]z_{critical} =[/tex]

Answer:

 [tex]z_{critical} = 2.33[/tex]

The observed value  is   [tex] z = 4.27  [/tex]

Step-by-step explanation:

From the question we are told that

   The sample size is  n  =  114

   The sample mean  is  [tex]\= x   =  30[/tex]

   The  significance level is  [tex]\alpha = 0.01[/tex]

   The population standard deviation is  [tex]\sigma = 5[/tex]

The null hypothesis is  [tex]H_o: \mu =28[/tex]  

 The alternative hypothesis is   H1: μ>28.

 Generally the test statistics (observed value ) is mathematically represented as

      [tex] z = \frac{ \= x - \mu }{ \frac{\sigma }{\sqrt{n} } } [/tex]

=>     [tex] z = \frac{ 30- 28 }{ \frac{5}{\sqrt{114} } }  [/tex]

=>     [tex] z = 4.27  [/tex]

From the normal distribution table the critical value  of  [tex]\alpha = 0.01[/tex] is  

     [tex]z_{critical} = 2.33[/tex]

Answer:

y+4

Step-by-step explanation:

Answer:

Small dog =18

Big dog=50

Step-by-step explanation:

68-50=18

Answer:

75+68

Step-by-step explanation:

Answer:

this answer is not avaliable because i didnt have any options.

Step-by-step explanation:

Answer:

The answer is B: Objects W and Y have balanced forces, and objects X and Z have unbalanced forces.

Step-by-step explanation:

Answer:

I think the first answer is 8 and I dont know the second answer

Answer:

-38 + (-30) = -68

-28 + 45 = 17

Answer:

x-2 =0

x=2

now

putting the x value in p

we have,

p(2) = x2 + 2x +k

= 2×2 +2×2+k

= 4+4+k

= 8+k

so,

Either

8+k =0

k= - 8