Addison owes his mom $39. He earned $30 for mowing his neighbors lawn and then lent his sister $21. Which expression represents Addison's financial situation?

A. -39 - 30 - 21
B. -39 + 30 - 21
C. 39 - 30 + 21
D. 39 + 30 + 21​

Yes, this is true.

A normal distribution with a mean of 0 and a standard deviation of 1 is often denoted as N(0, 1) or n(0, 1). This distribution is also known as the standard normal distribution. It is a symmetric bell-shaped distribution where the majority of the data falls within approximately three standard deviations from the mean.

The standard normal distribution, denoted as N(0, 1) or n(0, 1), is a specific type of normal distribution that has a mean of 0 and a standard deviation of 1. It is often used as a benchmark for comparing and standardizing data in statistical analysis.

The shape of the standard normal distribution is symmetric and bell-shaped. It follows the familiar "bell curve" pattern, where the data is concentrated around the mean and gradually tails off towards the extremes. The total area under the curve is equal to 1, representing the entire probability space.

The standard deviation of 1 indicates the spread or variability of the data. In a standard normal distribution, about 68% of the data falls within one standard deviation of the mean, approximately 95% falls within two standard deviations, and roughly 99.7% falls within three standard deviations.

The standard normal distribution is widely used in statistical calculations and hypothesis testing. It serves as a reference distribution for many statistical methods, such as z-tests and z-scores. By converting data from other normal distributions into standard units using z-scores, researchers can compare and analyze data from different distributions on a common scale.

The standard normal distribution also has specific properties that make it mathematically tractable. The cumulative distribution function (CDF) of the standard normal distribution, often denoted as Φ(z), gives the probability that a standard normal random variable is less than or equal to a given value z. This CDF is tabulated in standard statistical tables or can be calculated using mathematical functions.

Overall, the standard normal distribution is a fundamental concept in statistics, providing a reference distribution for comparing and analyzing data and serving as a basis for many statistical techniques and calculations.

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The linear equality for the given graph is x > 0.

Option (B) is correct.

What is linear equality?

In mathematics, a linear inequality is an inequality that involves a linear function. A linear inequality contains one of the symbols of inequality. It shows the data which is not equal in graph form.

The hollow circle in the linear equality shows that the point should be excluded and the line is going towards the positive x-axis.

So we can prepare the linear equality as

                       x > 0

Hence, the linear equality for the given graph is x > 0.

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Answer:

5\(\sqrt{2}\)

Step-by-step explanation:

prime factorising 50 inside root,

\(\sqrt{50}\)=\(\sqrt{5*5*2}\)

      5*5 is a perfect square

    So root of 5*5(or 25) is 5.

Hence 5 comes outside and 2 remains in bracket.

=5\(\sqrt{2}\)

Answer:

Volume=2521.91 mm³

Step-by-step explanation:

d=13, r=13/2=6.5, h=19

volume=πr²h

=π(6.5)²×19

=2521.91 mm³

hope it helps

have a great day!!

The amount of broccoli needed to be ordered to prepare 50 portion of broccoli flower is 3.375 kg.

You need to prepare 50 portions of broccoli flowers.

A prepared portion weighs 0.090 kg.

Trimming accounts for 25% of the total weight.

Therefore, to find how much broccoli is needed to order can be calculated as follows:

Therefore,

the broccoli needed to be ordered = 0.0675 × 50 = 3.375 kg

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Answer:

k = 1\(\frac{1}{4}\)  or 5/4

Step-by-step explanation:

5k = 5 + k

4k = 5

k = 5/4

Answer:

$85.39

Step-by-step explanation:

20% off of $99.99 is $79.99

6.75% of $79.99 is about $5.399325, rounding that to $5.40

$79.99+$5.40 is $85.39

Answer:

\( \frac{3x {}^{3} }{8} \)

Step-by-step explanation:

\( \frac{3 {x}^{3} }{8} \)

Answer:

kjh7563653 365385 36539y5 53nkddg dhdk djgd ghgkg d99  76  79

Step-by-step explanation:

Answer:

Option C

Step-by-step explanation:

Locate the two points on the graph

Answer

ok the correct answer is c

Step-by-step explanation:

its the only answer that has points on the graph

ur welcome;)

Answer:

even integer = { 0,2 }

odd integer = { 1,3 }

Step-by-step explanation:

-1 < x < 4 = { 0, 1 , 2, 3 }

x is an integer then the value of x is

= even integer = { 0,2 }

= odd integer = { 1,3 }

THANKS ʘ‿ʘ

I COME FROM INDONESIA

Answer:

I can't tell if there is a negative sign there but if there is it's -1, if not 1

Step-by-step explanation:

x=1

1=1

After the shorthand statement x -= 1 is executed, the value of x will be 0. So, the correct option is option A. 0.

The "-=" operator is a shorthand notation for subtracting the right-hand side value (in this case, 1) from the left-hand side variable (x) and then assigning the result back to the left-hand side variable. So "x -= 1" is equivalent to "x = x - 1".

The expression x -= 1 is shorthand for x = x - 1, which subtracts 1 from the value of x and then assigns the result back to x.

In this case, since the initial value of x is 1, subtracting 1 from it gives a result of 0, which is then assigned back to x. So the final value of x is 0.

Therefore, the correct answer is A. 0.

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Answer:

No

Step-by-step explanation: The first one is positive and the second one is negative

Answer:

B. 3× 2/4

______________

The total displacement of the runner after four minutes is 1256 metres.

The circumference is the perimeter of a circle or ellipse. That is, the circumference would be the arc length of the circle.

The circumference of a circle is expressed as;

C = 2πr

where C is the circumference and r is the radius of the circle.

The radius of the circle is 100m

Therefore the distance of the covered in 2 minutes

= 2 × 3.14 × 100

= 6.28 × 100

= 628 metres

Therefore the distance covered in 4 minutes

= 2 × 628

= 1256 metres

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Given the word problem, we can deduce the following information:

1. The values are given to find the percentage.

To determine the percentage, we divide $1,495 by $3,436 and multiply them by 100%. So,

Therefore, the answer is 43.51%.

Answer:

20.2 mm.

Step-by-step explanation:

2*2 + 2*8.1

= 4 + 16.2

= 20.2 mm.

The answer is A. $85.50

In the antimony trichloride system, when we assume only dilution when calculating concentrations, we are introducing a systematic error to our data.

The error in this assumption is that dilution is not the only process that occurs when calculating the concentration of the antimony trichloride system.

Antimony trichloride system refers to the equilibrium that is formed when antimony trichloride (SbCl₃) is dissolved in water. The reaction of antimony trichloride with water results in the formation of antimony ions (Sb⁺³) and chloride ions (Cl⁻). This reaction is represented by the following equation:

SbCl₃ + H₂O ↔ Sb⁺³ + 3Cl⁻

The equilibrium constant of the reaction is known as the antimony trichloride ionization constant (Kc).

The assumption of dilution only when calculating the concentration of the antimony trichloride system is introducing a systematic error in our data. This is because the reaction of antimony trichloride with water is not the only process that occurs when we are calculating the concentration of the system.

There are other factors that may affect the concentration of the system, such as temperature and pressure. Therefore, by assuming that dilution is the only process that affects the concentration of the antimony trichloride system, we are introducing a systematic error to our data. This error may result in inaccurate results when we are conducting experiments related to the antimony trichloride system.

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Answer:

7

Step-by-step explanation:

1+12-6=7

Answer:

This relationship is not a function.

Answer: B

Step-by-step explanation:t+4+3−2.2t

Add 4 and 3 to get 7.

t+7−2.2t

Combine t and −2.2t to get −1.2t.

−1.2t+7

The probability of drawing a green candy and a blue candy from the bag, one at a time and without replacement, is approximately 0.077 or 7.7%.

To calculate the probability of drawing a green candy and a blue candy from the bag without replacement, we need to determine the total number of candy combinations and the favorable combinations (green and blue candies).

The total number of candies in the bag is 3 blue + 4 green + 6 red = 13 candies.

When drawing the first candy, there are 13 candies to choose from. If a green candy is drawn, there are 4 green candies remaining out of the 12 candies left in the bag. Now, if a blue candy is drawn as the second candy, there are 3 blue candies remaining out of the 11 candies left in the bag.

The probability of drawing a green candy and a blue candy can be calculated as follows:

Probability = (Number of favorable combinations) / (Total number of candy combinations)

Number of favorable combinations = 4 (number of green candies) * 3 (number of blue candies) = 12

Total number of candy combinations = 13 (total candies) * 12 (remaining candies) = 156

Probability = 12 / 156 ≈ 0.077 or 7.7% (rounded to the nearest tenth)

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Both 0.7% and 17/25 are approximations and if you need more precision you can convert them to decimal form and or use more significant figures.

What is the decimal representation and fraction representation?

A decimal representation of a number is a way of expressing the number in terms of a decimal point and the powers of 10.

A fraction representation of a number is a way of expressing the number as the ratio of two integers, called the numerator and denominator. The numerator represents the number of parts of the whole, and the denominator represents the total number of parts in the whole.

0.7% is a decimal representation of a percentage. It means 0.7 parts per 100. It can also be written as 0.007 as a decimal.

17/25 is a fraction representation. It means 17 parts out of 25. It can also be written as 0.68 as a decimal.

Both 0.7% and 17/25 are approximations and if you need more precision you can convert them to decimal form and or use more significant figures.

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The area of a triangle is computed as follows:

where b is the base, and h is the height

Replacing with A = 54, h = 18, and solving for b, we get:

The base of the triangle is 6 in

Answer:

I believe it's the Gulf Stream

Step-by-step explanation:

"Warmer air associated with the North Atlantic drift brings warmer Gulf Stream waters to the western areas of the British Isles. Keeping it much warmer than it would otherwise be."

Answer:

im going to say the equator

Step-by-step explanation:

The likelihood that at least 150 people will collaborate and react in a fresh sample of 400 telephone numbers is 0.9953.

The probability informs us of the likelihood that an event will occur. It is necessary for the likelihood to fall between 0 and 1. The likelihood of success is 1, whereas the probability of failure is 0.

Given, that the market research  company has a history of having a 44% response rate for its telephone surveys.

Therefore, p=44%=0.44=μ

n=400

p=150/400

p=0.375

The standard deviation is then equal to,

σ=√(p(1-p))/n

σ=√(0.44(1-0.44))/400

σ=√(0.44×0.56)/400

σ=0.025

Using the z-table, the values are as follows:

z=(p-μ)/σ

z=(0.375-0.44)/0.025

z=-2.6

p(p>0.375)

=p(z>-2.6)

=1-p(z<-2.6)

=1-0.0047

=0.9953

=99.53%

Therefore, the likelihood that at least 150 people will participate and provide information in a new sample of 400 telephone numbers

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Standard deviation is a statistical measure of how much scores in a sample vary around the mean. The correct option is B.

The standard deviation is a statistic that expresses how much variance or dispersion there is in a group of numbers. While a high standard deviation suggests that the values are dispersed throughout a wider range, a low standard deviation suggests that the values tend to be close to the established mean.

Therefore, the standard deviation is a statistical measure of how much scores in a sample vary around the mean. The correct option is B.

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The confidence interval of 95% for the data with the provided conditions is [.483, .589].

In the 2009 regular season, catcher Joe Mauer of the Minnesota Twins had 276 hits in 514 at-bats.

The formula for confidence interval is given by:

CI = X ± Z × (σ / √n)

Where, CI = Confidence interval

X = Mean

σ = Standard deviation

Z = Confidence level

n = Sample size

Here, we need to calculate the 95% confidence interval.

So, the value of Z will be 1.96.

Now, we can calculate the mean and standard deviation.

Mean, X = 276 / 514

              = 0.53613

Standard deviation, σ = √[p(1-p)/n]

                                    = √[(276/514) (238/514)]

                                    ≈ 0.0266

So, the confidence interval will be:

CI = 0.53613 ± 1.96 (0.0266 / √514)

    = [0.483, 0.589]

Therefore, the correct option is:  [. 483, . 589].

The confidence interval for the data with the provided conditions is [.483, .589].

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