Plz help me ?????? Simplify: -√-625

The amount of annual rainfall in Portland last year. Therefore, options 2 and 4 are the correct answers.

A continuous random variable is a random variable whose values can take any value within a specified interval. The values of a continuous random variable can take any value on the real line.

In the above examples, the amount of annual rainfall in Portland last year and the weight of each football player on the Redskins team are both continuous random variables, as they can take any value within a specified interval.

The other examples given (the number of textbooks that each student has to buy for college, the amount of vanilla in a batch of chocolate chip cookies, and the number of dog sleds that a competitor uses in an annual sled dog race) are not continuous random variables, as they cannot take any value within a specified interval.

Therefore, options 2 and 4 are the correct answers.

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Answer: x < -3/2

Step-by-step explanation:

Step 1: Subtract 5 from both sides.

Step 2: Divide both sides by -2.

Have a great day and I hope this is right!

Answer:

9/13

Step-by-step explanation:

rise = y₂ - y₁ = -1 - (-10) = -1 + 10 =   9

run = x₂ - x₁ =   9 - (-4)   =   9 +   4 = 13

Step-by-step explanation:

Answer:

Hi

Step-by-step explanation:

I am just reply to see if i really understand that problem

Let's assume s the present age of the son, and f the present age of the father.

The age of the son After 10 years is equal to the age of the father before 20 years:

s+10=f+10-20

f=3s

=> s+10=f-10

=> s+10=3s-10

=> 2s=20

=> s=10 and  f=30

Answer:

Step-by-step explanation:

So it gives us the equation y=2x+3

Thinking process

1. What you want to do is remove the 3 from the equation so you just get y=2x

How to solve(example)

For the first row to find x first minus 3 from 9 which is 6

9-3=6

Then six divided by two so you can find x.

2x=6

x=3

The samples are normally distributed and have equal variances. If these assumptions are not met, alternative tests such as the Mann-Whitney U test or the Welch's t-test may be more appropriate.

To test whether people in Texas read more books than people in Colorado, a two-sample t-test would be appropriate.

The reason for choosing a two-sample t-test is that we are comparing the means of two independent samples (Texas and Colorado), and we want to determine if the difference between these means is statistically significant or if it could be due to random chance.

To understand whether the difference in means is statistically significant, we can calculate the t-statistic and compare it to the critical value from the t-distribution with degrees of freedom equal to the sum of the sample sizes minus two (df = n1 + n2 - 2). If the calculated t-statistic is greater than the critical value, we can reject the null hypothesis that the means are equal and conclude that there is a statistically significant difference between the means.

We can also calculate the p-value associated with the t-statistic and compare it to the significance level (usually 0.05). If the p-value is less than the significance level, we can reject the null hypothesis and conclude that there is a statistically significant difference between the means.

It's important to note that in order to perform a two-sample t-test, we need to assume that the samples are normally distributed and have equal variances. If these assumptions are not met, alternative tests such as the Mann-Whitney U test or the Welch's t-test may be more appropriate.

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This is the graph of the question y=x3 − 8

The probability of being dealt a 9, 10, jack, queen, king, all in the same suit is 0.000154%.

Dealing 5 cards from a standard 52-card deck constitutes a specific type of event that can be explained using probability.

In order to calculate the probability of being dealt a 9, 10, jack, queen, king, all in the same suit, it is important to know the different card combinations that can occur during the experiment.
There are four suits in a standard 52-card deck: hearts, clubs, diamonds, and spades. Each suit has 13 cards, which are numbered 2 to 10, plus the ace, king, queen, and jack.
The probability of being dealt a 9, 10, jack, queen, king, all in the same suit is calculated using the following formula:
Number of ways to get a 9, 10, jack, queen, king, all in the same suit / Total number of possible 5-card hands
The number of ways to get a 9, 10, jack, queen, king, all in the same suit is calculated as follows:
There are 4 suits, and we need all five cards to be in the same suit. Therefore, there are 4 ways to choose the suit for the hand.
Once the suit is chosen, there are only 1 possible combination of cards that includes the 9, 10, jack, queen, and king.

Therefore, there is only 1 way to choose the actual cards for the hand.
The total number of possible 5-card hands is calculated using the formula:
52C5 = (52!)/((52-5)!5!) = 2,598,960
Therefore, the probability of being dealt a 9, 10, jack, queen, king, all in the same suit is:
4*1 / 2,598,960 = 0.000154%

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Answer:

Step-by-step explanation:

The angle bisector of a triangle divides the opposite side in 2 segments that are proportional to the other 2 sides of the triangle. Namely:

\(\frac{15}{18}=\frac{w}{30}\) and cross multiply.

18w = 450 so

w = 25

The leading coefficient in polynomial f(x)=7x-8x^5-2+9x^2+2x^7 is 2.

What are polynomials?

Polynomials are algebraic expressions that consist of variables and coefficients. Variables are also sometimes called indeterminates. We can perform arithmetic operations such as addition, subtraction, multiplication, and also positive integer exponents for polynomial expressions but not division by variable. An example of a polynomial with one variable is x^2+x-12. In this example, there are three terms: x^2, x and -12.

Based on the number of terms present in the expression, it is classified as monomial, binomial, and trinomial.

Now,

As given polynomial is f(x)=7x-8x^5-2+9x^2+2x^7

We can write it as f(x)=2x^7+8x^5+9X^2+7x-2

The leading coefficient of a polynomial is the coefficient of the term having the highest power.

As highest power is 7.

Hence,

      The leading coefficient in polynomial f(x)=7x-8x^5-2+9x^2+2x^7 is 2.

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The empirical rule in a normal distribution states that 99.7%  of the data falls within three standard deviations of the mean. Hence, option D is the correct option.

The empirical rule in a normal distribution is also referred to as the three-sigma rule or 68-95-99.7 rule. It is a rule in statistics that tells us that for a normal distribution, all of the observed data fall within the three standard deviations of the mean (denoted by σ) or within the average (denoted by µ).

According to this rule, 68% of the observations fall under the first standard deviation (µ ± σ), and 95% within the first two standard deviations (µ ± 2σ). In addition to this, 99.7%  of the data falls within three standard deviations of the mean. Hence, we know that option D is the correct option.

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Ashley used 8/25 of the spool for her project.

To determine the fraction of the spool that Ashley used for her project, we need to multiply the fraction of the spool she had (4/5) by the fraction she used (2/5):

(4/5) * (2/5) = 8/25

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Answer:

People who bought tickets = 100%

                                             = 8000

People who bought their tickets in person = (100%-60%-15%) × 8000

                                                                       = 2000

The number of tickets sold online is 4800, by phone is 1200, and in person is 2000.

The Percentage is defined as representing any number with respect to 100. It is denoted by the sign %. The percentage stands for "out of 100." Imagine any measurement or object being divided into 100 equal bits.

Given that there were 8000 people at the festival. people bought their tickets online, by phone, or in person. based on a random sample of people at the festival, 60% bought their tickets online, and 15% bought their tickets by phone.

The number of the tickets will be calculated as below:-

Total tickets = 8000

Online tickets = 60% of 8000 = 8000 x 0.6 = 4800

By phone = 15% of 8000 = 8000 x 0.15 = 1200

In-person = 25% x 8000 = 0.25 x 89000 = 2000

Therefore, the number of tickets sold online is 4800, by phone is 1200, and in person is 2000.

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To replace the GROUPING SETS part with ROLLUP, delete the GROUPING SETS line and add 'WITH ROLLUP' in the GROUP BY line.

1. Replace GROUPING SETS with ROLLUP: The GROUPING SETS clause is used to generate multiple grouping sets in a single query. To replace it with ROLLUP, we need to modify the query to use the ROLLUP operator instead. The ROLLUP operator provides a shorthand way to specify multiple levels of grouping in a query.

2. Delete GROUPING SETS line: Once we decide to use ROLLUP, we can remove the GROUPING SETS line from the query since it is no longer needed.

3. Add 'WITH ROLLUP' in GROUP BY line: In the GROUP BY clause of the query, we include the 'WITH ROLLUP' statement to indicate that we want to include the ROLLUP functionality. This allows us to create subtotals and grand totals in the result set based on the specified grouping columns.

By making these changes, we can replace the GROUPING SETS part with ROLLUP, simplifying the query and achieving the desired grouping and subtotaling functionality.

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Answer: no alike terms

Step-by-step explanation:

6x+12+3x+21+88

Combine Like Terms:

=6x+12+3x+21+88

=(6x+3x)+(12+21+88)

=9x+121

Answer:

=9x+121

The histograms typically are used to display continuous measures.

There are different types of charts: histogram, line chart, pie chart, and others.

The histogram is a type of chart used as a tool that provides a way to assess the distribution of data. From this type of chart, a set of data are previously tabulated and divided into classes. In the other words, the histogram is applied to summarize discrete or continuous measures, so it becomes more easily the understand the used data. There are many websites and software that allow the plot of this type of chart.

From the explanation, it is possible to identify the histograms typically are used to display continuous measures.

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The inequality for the times when Valente is closer than Chiamaka to the university is - 170 + 110t < 149 + 95t

Distance of Chiamaka = 149km

Driving distance of Chiamaka = 95km

Distance of Valente = 170 km

Driving distance of Valente = 110 km

The graph of a linear function is always a straight line. A linear function has the form shown below. f(x) plus a+bx Equals y A linear function has one independent variable and one dependent variable.

Calculating the distances of Chiamaka -

C(t) = 149 + 95t

Calculating the distances of Valente -

V(t) = 170 + 110t

Now, Valente is closer when:

V(t) < C(t)

Figuring out the inequality -

170 + 110t < 149 + 95t

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Answer:

78kg

Step-by-step explanation:

76×5= 380kg

380-72-74-75-81= 78kg

Answer:

B and D are both correct

Step-by-step explanation:

Answer:

substitute for v, when v = -2.9

Step-by-step explanation:

\(-1.98=5.2v+13.1\)

subtract 13.1 on both sides.

\(-15.08=5.2v\)

divide by 5.2 to isolate v

\(\frac{-15.08}{5.2} = \frac{5.2v}{5.2}\)

\(-2.9=v\)

substitute for v

\(-1.98=5.2(-2.9)+13.1\)

\(-1.98=-15.08+13.1\)

\(-1.98=-1.98\)

A closed under addition can be proved if the sum of any two members of the set also belongs to the set.

We can take any two even integers and add them together. The result is an even integer. A set is closed under scalar multiplication if the product of any member and a scalar is also in the set. In other words, if x is in S and a is any scalar then ax will be in the set if the set is closed under scalar multiplication. For example, the set of 2 x 2 diagonal matrices is closed under scalar multiplication.

For example,

A = {( x, y) , y = 0 }

B= { (x, y) , x+ y = 1 }

Typical elements of A are (1,0), (2,0). The element (1,1) is an element not in A. Typical elements of B are (1,0), (1/2,1/2). The element (1,1) is an element not in B. Now A and B carry an addition that is  (x, y)+(x', y')=(x + y, x' + y')). Saying that A is closed under addition just means that whenever you take two elements in A, the sum of those elements is again in A. Let's check if this is the case: two elements in A have the form (x, 0) and (x', 0). The sum of those elements is (x + x', 0), and this is again in A. Thus A is closed under addition.

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Step-by-step explanation:

start with bracket,4 + 8=12

1/2×12=6

The Alexander family used their sprinkler for 35 hours, and the Chen family used their sprinkler for 30 hours.

To find out how long each sprinkler was used, we can set up a system of equations. Let's say the Alexander family used their sprinkler for x hours, and the Chen family used their sprinkler for y hours.

From the given information, we know that the water output rate for the Alexander family's sprinkler is 30 liters per hour. Therefore, the total water output from their sprinkler is 30x liters.

Similarly, the water output rate for the Chen family's sprinkler is 40 liters per hour, resulting in a total water output of 40y liters.

Since the combined total water output from both sprinklers is 2250 liters, we can set up the equation 30x + 40y = 2250.

We also know that the families used their sprinklers for a combined total of 65 hours, so we can set up the equation x + y = 65.

Now we can solve this system of equations to find the values of x and y, which represent the number of hours each sprinkler was used.

By solving the equation we get,

The Alexander family used their sprinkler for 35 hours, and the Chen family used their sprinkler for 30 hours.

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Answer:

subtract 2x from 3x thats x so 50=x

Step-by-step explanation:

Answer:x=50

Step-by-step explanation:bring 3x over on one side with 2x and bring 50 over on the other side by itself.

The equation becomes 2x-3x=-50

2x-3x is -x

so the equation is -x=-50

there are two negatives in the equation so you make the equation positive because a negative and a negative equals a positive

Therefore the answer is x=50

Answer:

Area of sector: 48π in^2; Option D

Step-by-step explanation:

~ We can see that the bolded portion of the circle must be the the sector that we need to compute the area of... ~

Let us plan out this problem. If we were to find the area of the circle provided a radius of 12 inches, we could create a proportionality between the degree of the sector, and the degree of the circle ( 360 ) and the area of the sector and the area of the circle.

1. To calculate the area of this circle, let us apply the formula πr^2, such that r is 12 inches ( and let us keep π in terms of π ) ⇒ π * ( 12 )^2 ⇒ 144 * π ⇒ Area of Circle: 144π

2. Let us see this as a proportionality:

Degree of sector/ Degree of circle = Area of sector/ Area of circle

3. Now let us say x ⇒ Area of the sector. Substitute values into this formula, and solve for x through algebra:

120 / 360 = x / 144π,

120 * 144π = 360 * x,

17,280π = 360 * x,

x = 17,280π / 360,

Area of sector: 48π in^2

Answer: Area: (100+75π/2)cm^2 Perimeter: (10+75π/2)cm

Step-by-step explanation:

Area of total shape

= square+3 semi-circles

=100cm^2 + 5*5πcm^2*3/2 = 100cm^2+75/2*πcm^2

= (100+75π/2)cm^2

Perimeter of shape

= 10cm + 25/2π*3cm

= (10+75π/2)cm

Step-by-step explanation:

in this figure you can observe 1 cube and 3 half cirles

the flield of the square would by using a formula a(lenght) * b(height)

in this case it would be 10m * 10m = 100m

and the formula for a cirle would be

A = pir^2

knowing that we can connect two of the halfs and make a cirle with a radius of 5

A= pi 5^2

A= pi 25

25pi approximatly equals to 78.53982m

knowing that information we can devide that value by 2 and get the value of the 3rd half cirlce

which is 39.26991m

than we add all the values we collected

39.26991m + 78.53982m + 100m = 217.80973 m

Answer:

2=(2,4,6,8,10,12,14,16,18)

4=(4,8,12,16)

Answer:

4

Step-by-step explanation:

The quotient of eight and two is the same as the equation 8/2 which equals to 4.

Quotient means divide.

8 / 2 = 4

Best of Luck!