I’ve been stuck can someone explain

Answer:

=x^2+7x+10

Step-by-step explanation:

Simplify: xx+5x+2x+2.5: x+7x+10

Add similar elements: 5x+2x= 7x

=xx+7x+2.5

xx=x2

2.5=10

=x+7x+10

Answer: =x^2+7x+10

Hope this helps.

Answer:

Lance would need 3.125 gallons of water.

Step-by-step explanation:

Divide the value by 16

After converting the volume into gallons, Lance needs 3.125 gallons of water for the runners in a race.

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

Lance needs 50 cups of water for the runners in a race.

We know that;

⇒ 1 gallons = 16 cups

⇒ 1 cups = 1/16 gallons

Here, Lance needs 50 cups of water for the runners in a race.

Hence, We get;

⇒ 50 cups = 50 × 1/16 gallons

                 = 3.125 gallons

Learn more about the divide visit:

https://brainly.com/question/28119824

#SPJ2

Answer:

A. G(x) = x - 9

Step-by-step explanation:

For the function F(x) to shift right, there needs to be a negative number being subtracted. In this case, only answer "A," fits. This is because 9 is being subtracted, making the function shift to the right 9 units.

Answer:

pHotOsPHerE

Step-by-step explanation:

Answer:

Photosphere

Step-by-step explanation:

Answer:

43.46% probability that the person will need to wait at least 9 minutes total

Step-by-step explanation:

To solve this question, we need to understand conditional probability and the exponential distribution.

Conditional probability:

We use the conditional probability formula to solve this question. It is

[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]

In which

P(B|A) is the probability of event B happening, given that A happened.

[tex]P(A \cap B)[/tex] is the probability of both A and B happening.

P(A) is the probability of A happening.

Expontial distribution:

The exponential probability distribution, with mean m, is described by the following equation:

[tex]f(x) = \mu e^{-\mu x}[/tex]

In which [tex]\mu = \frac{1}{m}[/tex] is the decay parameter.

The probability that x is lower or equal to a is given by:

[tex]P(X \leq x) = \int\limits^a_0 {f(x)} \, dx[/tex]

Which has the following solution:

[tex]P(X \leq x) = 1 - e^{-\mu x}[/tex]

The probability of finding a value higher than x is:

[tex]P(X > x) = 1 - P(X \leq x) = 1 - (1 - e^{-\mu x}) = e^{-\mu x}[/tex]

In this question:

Event A: Waited at least 4 minutes.

Event B: Waiting at least 9 minutes.

The length of time for one individual to be served at a cafeteria is an exponential random variable with mean of 6 minutes.

This means that [tex]m = 6, \mu = \frac{1}{6}[/tex]

Probability of waiting at least 4 minutes.

[tex]P(A) = P(X \geq 4) = P(X > 4)[/tex]

[tex]P(A) = P(X > 4) = e^{-\frac{4}{6}} = 0.5134[/tex]

Intersection:

The intersection between a waiting time of at least 4 minutes and a waiting time of at list 9 minutes is a waiting time of 9 minutes. So

[tex]P(A \cap B) = P(X > 9) = e^{-\frac{9}{6}} = 0.2231[/tex]

What is the probability that the person will need to wait at least 9 minutes total

[tex]P(B|A) = \frac{0.2231}{0.5134} = 0.4346[/tex]

43.46% probability that the person will need to wait at least 9 minutes total

Answer:

67 feet^2

Step-by-step explanation:

Surface Area = 2×(4×2.6 + 4×3.5 + 2.6×3.5) = 67 feet^2

Answer:

67 feet^2

Step-by-step explanation:

Surface Area = 2×(4×2.6 + 4×3.5 + 2.6×3.5) = 67 feet^2

Answer:

20

Step-by-step explanation:

10 for each for their being in the tens place, and ten for the ones place.

Answer:

perimeter

Step-by-step explanation:

She would choose perimeter

Because perimeter is the outside of a object and she ran the outside of the soccer field so ya mark be as brainliest plssss

Answer:

√10 / 10

Step-by-step explanation:

tan θ > 0 and sin θ < 0, so θ is in quadrant III.  That means cos θ < 0.

cos(θ + π/4)

Use angle sum formula.

cos θ cos(π/4) − sin θ sin(π/4)

½√2 cos θ − ½√2 sin θ

Factor.

½√2 cos θ (1 − tan θ)

½√2 cos θ (1 − 2)

-½√2 cos θ

Write in terms of secant.

-½√2 / sec θ

Use Pythagorean identity (remember that cos θ < 0).

-½√2 / -√(1 + tan²θ)

-½√2 / -√(1 + 2²)

½√2 / √5

√10 / 10

Answer:

It should be 222

Step-by-step explanation:

Answer:

222

Step-by-step explanation:

3x^3+2x^2-2x+6

x=4

=3(4)^3+2(4)^2-2(4)+6

=192+32-8+6

=224-2

=222

Answer:

X=8

Step-by-step explanation:

3x+ 6 = 5x -10

6+10=5X-3X

16=2X

X=8

Answer:

26 lb is 11.8 kg.

Step-by-step explanation:

A pound (lb) is a unit of mass used in the imperial and US customary systems of measurement.

A kilogram (kg) is the base unit of mass in the International System of Units (SI).

To convert 26 lb to kg.

First, use the conversion factor between pounds and kilograms.

1 kg = 2.2046 lb

Next, write the following equation to find the weight in kg:

weight in kg = weight in lb x (1 kg / 2.2046 lb)

The pounds cancel out, leaving kilograms.

weight in kg = 26 lb x (1 kg / 2.2046 lb)

weight in kg  = 11.7935 kg

Rounding to the nearest tenth.

weight in kg  = 11.8 kg

Answer:

  5

Step-by-step explanation:

When the factors are linear, as here, the total number of roots is the sum of the exponents of the factors:

  3 + 1 + 1 = 5 . . . . sum of factor exponents

f(x) has 5 roots.

Answer:

OK so we can see that when x increases y does too. The answer is C

Answer:

Like for black lives

Step-by-step explanation:

black lives matter yeahhhhhh

Answer:

30 60 90

Step-by-step explanation:

Answer:

C.  ​No, the distribution is not symmetric and the frequencies do not start off low.

Step-by-step explanation:

Hello!

You have the data of daily rainfall for one month (inches)

To arrange a data set in a frequency table you have to determine the number of class intervals you want to make, then you calculate their widths as: "total observations"/"desired number of intervals". Once you have the class width, you can determine the limits of the intervals. For the first interval, you select the minimum value of the sample and add the width to obtain the upper limit. Then you have to use that limit as the lower limit of the next interval and add the width to obtain the next limit. And so on until the last one.

In this example you have a given class width of 0.20 and the lower limit for the first interval is 0.00.

Once you have all intervals determined, you have to arrange the data set from least to greatest and count how many observations correspond to each interval.

The symbol [;) in the intervals indicates that the interval is "closed" on the lower limit and "open" on the upper limit. Meaning, if you have for example the observation "0.20" and the intervals [0.00; 0.20) and [0.20; 0.40), the first interval has a limit equal to 0.20 but is open, meaning that the observation does not belong to it, it belongs to the next interval.

(See table in attachment)

Does the frequency distribution appear to be roughly a normal​ distribution?

A.  ​No, although the distribution is approximately​ symmetric, the frequencies do not start​ low, increase to some maximum​ frequency, then decrease.

B.  ​No, although the frequencies start​ low, increase to some ​maximum, then​ decrease, the distribution is not symmetric.

C.  ​No, the distribution is not symmetric and the frequencies do not start off low.

D.  ​Yes, all the requirements are met.

As you can see not all defined intervals have at least one observed frequency, most of the observations belong to the first and second one. And there is value, 1.28 inches, that shifts the distribution to the right making it strongly skewed. This distribution is far away from being normally distributed.

Hope it helps!

Answer:

[tex]P(28<X<31.5)=P(\frac{28-\mu}{\sigma}<\frac{X-\mu}{\sigma}<\frac{31.5-\mu}{\sigma})=P(\frac{28-30}{2}<Z<\frac{31.5-30}{2})=P(-1<z<0.75)[/tex]

We can find this probability with this difference

[tex]P(-1<z<0.75)=P(z<0.75)-P(z<-1)[/tex]

If we use the normal standard distribution or excel we got:

[tex]P(-1<z<0.75)=P(z<0.75)-P(z<-1)=0.773-0.159=0.614[/tex]

Step-by-step explanation:

Let X the random variable that represent the weights for a can of pumpkin pie, and for this case we know the distribution for X is given by:

[tex]X \sim N(30,2)[/tex]  

Where [tex]\mu=30[/tex] and [tex]\sigma=2[/tex]

We are interested on this probability

[tex]P(28<X<31.5)[/tex]

We can use the z score formula given by:

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

Using this formula we got:

[tex]P(28<X<31.5)=P(\frac{28-\mu}{\sigma}<\frac{X-\mu}{\sigma}<\frac{31.5-\mu}{\sigma})=P(\frac{28-30}{2}<Z<\frac{31.5-30}{2})=P(-1<z<0.75)[/tex]

We can find this probability with this difference

[tex]P(-1<z<0.75)=P(z<0.75)-P(z<-1)[/tex]

If we use the normal standard distribution or excel we got:

[tex]P(-1<z<0.75)=P(z<0.75)-P(z<-1)=0.773-0.159=0.614[/tex]

Answer:

1/4n-2=10

Step-by-step explanation:

Answer:

36.23 kilograms of roasted beef

Step-by-step explanation:

If deli sliced 13.7 kilograms (kg) of roasted beef one week

He sliced 22.53 kilograms (kg) the next week

Total sliced kilograms of roasted beef=13.7 kg + 22.53 kg

=36.23 kg

The deli sliced a total of 36.23 kilograms of roasted beef in the two weeks.

Answer:

4 - 5

Step-by-step explanation:

square root of 20 is 4.472135955 therefore the two whole numbers it is between are 4 and 5.

Answer:

Step-by-step explanation:

Given the cost of a car to be RS 1,000,000, if the car depreciates yearly by 5%, then the insurance premium paid which is the operating expenses eacg year will be calculated as thus;

In the first year;

insurance premium paid = 5% of RS 1,000,000

= 5/100 * 1,000,000

= RS50,000

cost of the car after the first year of usage = 1,000,000-50,000

= RS 950,000

In the second year;

Insurance premium paid in the second year = 5% of RS 950,000

= 5/100 * 950,000

= 5*9,500

= RS 47,500

cost of the car at the end of second year = 950,000-47,500 = RS 902,500

In the third year;

Insurance premium paid in the third year = 5% of RS 902,500

= 5/100 * 902,500

= 5*9,025

= RS 45,125

Answer:

closed questions are questions with fixed answer options

A. Closed questions allow the respondent to go​ in-depth with their answers.

B. It is possible to automate the collection of results for closed questions.

C. Closed questions allow for new solutions to be introduced.

D. It is easy to quantify and compare the results of surveys with closed questions.

Answer:

D.) 9m

Step-by-step explanation:

Answer:

its d

Step-by-step explanation:

i just did the question

Answer:

12

Step-by-step explanation:

One part is 1 so 13 minus 1 is 12

Answer:

56.45  

Step-by-step explanation:

Coefficient skewness=(Third quartile+ first quartile)-n*Median/Third quartile-first quartile

Third quartile is the unknown?

First quartile is 30.8

n is the number of steps taken from first quartile to reach third quartile which is 2 steps.

coefficient skewness is -0.38

let p represent third quartile

-0.38=(p+30.8)-2(48.5)/p-30.8

by cross multiplication

-0.38(p-30.8)=(p+30.8)-97

-0.38p+ 11.704  =p+30.8-97

-0.38p-p=30.8-97-11.704

-1.38p=-77.904

p=-77.904 /-1.38= 56.45  

Answer:

12.49 ft²

Step-by-step explanation:

The straight parts of P are both r,

So 2r + 2πr / 4 = 14.28

r (2 + π/2) = 14.28

r = 14.28 / 3.57 = 4

the area will be πr²/4 ≈ 12.56 ft²

Answer: 12.56 ft²

Step-by-step explanation:

Perimeter of a circle is known as the circumference.

C = 2π·r   where r is the radius.

Perimeter of the curve of the quarter circle + both sides

[tex]Perimeter=\dfrac{1}{4}Circumference+2\ sides\\\\\\P = \dfrac{1}{4}2\pi \cdot r+2r\\\\\\14.28=\dfrac{\pi\cdot r}{2}+2r\\\\\\28.56=\pi \cdot r+4r\\\\\\28.56=r(\pi +4)\\\\\\\dfrac{28.56}{\pi +4}=r[/tex]

A = π·r²

[tex]\dfrac{1}{4}A=\dfrac{1}{4}\pi \cdot r^2\\\\\\.\quad =\dfrac{1}{4}\pi \bigg(\dfrac{28.56}{\pi +4}\bigg)^2\\\\\\.\quad =\dfrac{1}{4}(3.14)\bigg(\dfrac{28.56}{7.14}\bigg)^2\\\\\\.\quad = \large\boxed{12.56}[/tex]

Answer:

Step-by-step explanation:

ported that 22% of adults in France admitted to texting or e-mailing while driving. A random sample of 110 French adults was randomly selected. What is the probability that 26

Using a binomial distribution with mean = n*p = 110*0.22 = 24.2 and variance = n*p*(1-p) = 24.2*(1-0.22) = 18.876

Approximating it to a normal distribution,

[tex]P(x\geq 26)\\\\=P(Z\geq \frac{26-24.2}{\sqrt{18.876} } )\\\\=P(Z\geq 0.41)\\\\=0.3481[/tex]

Answer: 5 people

Step-by-step explanation: I was the killer... lol

Answer:

Options C, D

Options E, 1

Step-by-step explanation:

The cited value 5% is part of the observational distribution of the diet

The cited value 9% is part of the experimental distribution of diet choice, given ethnicity

The math symbol that represent the 5% is P- the population proportion.