question is attached thank you so much ​

Answer:

7.5

Step-by-step explanation:

If Circumference = 15 pi, then the diameter is 15 mm, so the radius = 7.5 mm.

Answer:

The vertex is located at (1,-4)

Step-by-step explanation:

Equation of the Quadratic Function

The vertex form of the quadratic function has the following equation:

[tex]y=a(x-h)^2+k[/tex]

Where (h, k) is the vertex of the parabola that results when plotting the function, and a is a coefficient different from zero.

We have the following quadratic equation and we need to express it in vertex form. Thus, we need to complete the squares:

[tex]y=x^2-2x-3[/tex]

Adding and subtracting 1:

[tex]y=x^2-2x+1-3-1[/tex]

The first three terms are the square of a binomial:

[tex]y=(x-1)^2-4[/tex]

Comparing to the vertex form of a quadratic equation, the vertex is at (1,-4).

The vertex is located at (1,-4)

Answer: Yes

Step-by-step explanation:

x=2 is a vertical line with an undefined slope, and y=5 is a horizontal line with a slope of 0. Since these lines have slopes that are negative reciprocals, they are perpendicular.

Answer:

The conclusion

There is sufficient evidence to conclude that the  the residents of this particular city are spending significantly (at 5% level) more time watching TV than the average for this geographic area.

Step-by-step explanation:

From the question we are told that

   The population mean is [tex]\mu = 13 \ hours\ per\ week[/tex]

   The sample size is  n= 16

    The sample  mean is  [tex]\= x = 15.3[/tex]

    The standard deviation is  [tex]s = 3.8\ hours.[/tex]

   The null hypothesis is  [tex]H_o : \mu = 13[/tex]

    The alternative hypothesis is  [tex]H_a : \mu > 13[/tex]

     The level of significance is  [tex]\alpha = 0.05[/tex]

Generally the test statistics is mathematically represented as

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

=>   [tex]t = \frac{15.3 - 13 }{ \frac{ 3.8 }{\sqrt{16} } }[/tex]

=>   [tex]t = 2.42[/tex]

 Generally the p-value is mathematically represented as

      [tex]p-value = P(z > 2.42)[/tex]

From the z -table  

       [tex]P(z > 2.42) = 0.0077603[/tex]

=>   [tex]p-value = 0.0077603[/tex]

From the values obtained we see that  [tex]p-value < \alpha[/tex]

Hence we reject the  null hypothesis

   Therefore there is sufficient evidence to conclude that the  the residents of this particular city are spending significantly (at 5% level) more time watching TV than the average for this geographic area.

Answer:

x=15

Step-by-step explanation:

[tex]18^2=12(x+12)\\\\324=12(x+12)\\\\323=12x+144\\\\\cfrac{180}{12} =\cfrac{12x}{12} \\\\x=15[/tex]

~

Answer:

The car will be worth 6,624$ in 3-years

Step-by-step explanation:

Firstly we need to move the decimal two to the left, so the decimal form of 1% is 0.01.

Secondly, we make the equation by plugging in a multiplication sign and the cost of the car. Example - (0.01 x 10,350).

Now, that we have everything in an equation we can multiply 0.01 by 10,350, which will give us what 0.01 percent of 10,350 is, (103.5).

Lastly, we will subtract 103.5 from the cost of the car (10,350) to get the value of the car after the first month. The cost of the car will be $10,246.5. To find the value after the next two years we will repeat these steps...

Answer:

True

I hope this helps!

Answer:

53 miles

Step-by-step explanation:

80 miles per hour

x miles per 45 minutes

So, we know that an hour is 60 minutes so lets change the hour to that.

80 miles per 60 minutes

x miles per 45 minutes

Now, we do cross-multiplication:

[tex]\frac{x}{45}[/tex]  [tex]\frac{80}{60}[/tex]

So, we multiply 80 by 45 which is 3200. Then, we divide 3200 by 60 which is 53.3. So, the train travels 53.3 miles in 45 minutes.

But to round it, it would be 53 miles.

Hope this helps

The number of miles traveled by train in 45 minutes will be 60 miles.

Speed is defined as the length traveled by a particle or entity in an hour. It is a scale parameter. It is the ratio of length to duration.

We know that the speed formula

Speed = Distance/Time

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The speed of the train is 80 miles per hour. Then the number of miles in 45 minutes is calculated as,

80 = D / (45 / 60)

D = 80 x 45 / 60

D = 60 miles

The number of miles traveled by train in 45 minutes will be 60 miles.

More about the speed link is given below.

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[tex]\\ \sf\longmapsto12x+7=10(x+1)-3[/tex]

[tex]\\ \sf\longmapsto 12x+7=10x+10-3[/tex]

[tex]\\ \sf\longmapsto 12x+7=10x+7[/tex]

[tex]\\ \sf\longmapsto 12x=10x[/tex]

[tex]\\ \sf\longmapsto x=10/12=5/6[/tex]

We need natural number

[tex]\\ \sf\longmapsto 12(0)=10(0)[/tex]

Yes 0 is a solution

La fuerza por unidad de longitud del cable recto que lleva es de 7,52 N/m.

La fuerza magnética se refiere a la fuerza que experimenta un cuerpo en el campo magnético.

Tenemos la siguiente información;

Corriente (I) = 9,40 A

Campo magnético = 0,80 T

Dado que;

F = BIL senθ

Tenemos que encontrar la fuerza por unidad de longitud así;

F/L = BIsenθ

F/L = 0,80 T * 9,40 A Sen 90 = 7,52 N/m

Obtenga más información sobre el campo magnético: https://brainly.com/question/19542022

Answer:

C = 56.52 Inch.

Step-by-step explanation:

Formula: C = 2πr

C = 2π (9)

C = 18π

C = 18 (3.14)

C = 56.52 Inches

Answer:

the third one

Step-by-step explanation:

Answer:

I think the 3rd one

Step-by-step explanation:

Answer:

The second option

Step-by-step explanation:

The square root of a function could be smaller than 3, so the function could evaluate to less than 0, but the other 3 don't have any points smaller than 0. Therefore, the only possible option is the 2nd one.

Also, if you try to evaluate it in x = 0, which is sqrt(0)-3 = -3, the only option that satisfies that would be the second one.

I hope this helped.

The second option is the graph of y = √x-3.

Here, we have,

The square root of a function could be smaller than 3,

so the function could evaluate to less than 0, but the other 3 don't have any points smaller than 0.

Therefore, the only possible option is the 2nd one.

The graph of y = √(x) - 3 represents a square root function that is shifted vertically downward by 3 units.

The square root function itself is a curve that starts at the point (0, 0) and gradually increases as x increases.

By subtracting 3 from the square root function, the entire graph is shifted downward by 3 units.

This means that the new y-values of the graph are 3 units less than the corresponding y-values of the square root function.

Also, if you try to evaluate it in x = 0, which is √(0)-3 = -3,

the only option that satisfies that would be the second one.

To learn more on graph click:

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Soln

here

weight = 30 kg

Force = weight × 10

= 30×10

= 300

Area = cm

= 100/100

= 1

now,

Pressure = Force/Area

= 300/1

= 300 pa.

Answer:

190

Step-by-step explanation:

Answer:

240°

Step-by-step explanation:

measure of XWZ = 360 - 120 = 240°

The measure of arc wz is 240 degrees.

here, we have,

we know that,

A small arc is one with a measure of fewer than 180 degrees. A major arc is one with a measure greater than 180 degrees. A semicircle is an arc that divides a circle in half and has a measure of 180 degrees.

An arc is a continuous segment of a circle. There are two sections, one of which is larger than the other. The major arc is the larger one, and the minor arc is the smaller one.

Given:

From diagram, m ∠xz = 120 degrees.

We know that whole circle = 360 degrees

So, measure of arc wz = 360 - 120

                                     = 240

Hence, the measure of arc wz is 240 degrees.

Learn more about Major and Minor Arc here:

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Answer:

Both are equal.

Step-by-step explanation:

.5 is a decimal and you get it by dividing 1 by 2, or 1/2.

So 1/2 ultimately means .5.

See picture for math work and answer.

Answer:

P(x=5)=0.2

Step-by-step explanation:

Binomial Distribution

Consider a random event that has only two possible outcomes. Call p to the probability that the event has a 'successful' outcome, and q to the 'unsuccessful' outcome.

It's clear that p+q=1, or q=1-p.

Now repeat the random event n times. We want to calculate the probability of getting x successful outcomes. This can be done with the following formula:

[tex]\displaystyle P_{x} = {n \choose x} p^{x} q^{n-x}[/tex]

Where

[tex]\displaystyle {n \choose x}[/tex]

Is the number of combinations:

[tex]\displaystyle {n \choose x} =_nC_x=\frac{n !}{x ! (n-x) !}[/tex]

Calculate the probability for n=10, p=0.4, x=5. It follows that q=1-p=0.6:

[tex]\displaystyle P_{5} = {10 \choose 5}\cdot 0.4^{5}\cdot 0.6^{10-5}[/tex]

[tex]\displaystyle P_{5} = 252\cdot 0.4^{5}\cdot 0.6^{5}[/tex]

[tex]P_{5} = 0.2[/tex]

P(x=5)=0.2

Answer:

mean= 1588 and Standard deviation=190.99

Step-by-step explanation:

b. There are infinitely many solutions there are infinitely many numbers that are greater than or equal to 4

c. The boundary point for the inequality is at x=4 because any value less would make the inequality not true. The ralationship with the inequality is that it is the only solution that makes the inequality exactly equal to 13

d. (see image) just account for the x direction and ignore the y

A is solved according to you

#b

We have to create a interval notation to find

Let's check

[tex]\\ \rm\rightarrowtail 4x-3\geqslant 13[/tex]

[tex]\\ \rm\rightarrowtail 4x\geqslant 16[/tex]

[tex]\\ \rm\rightarrowtail x\geqslant 4[/tex]

So

[tex]\\ \rm\rightarrowtail x\in [4,\infty)[/tex]

#c

Boundary is when the inequality becomes false

Here its

#d

Attached

Answer:

30 in³

Step-by-step explanation:

surface area = 2(2 * 5 + 5 * u + 2 * u) = 62

2(10 + 5u + 2u) = 62

2(10 + 7u) = 62

10 + 7u = 62/2 = 31

7u = 31 - 10 = 21

so u = 21/7 = 3 in

Volume = 2 * 5 * 3 = 30 in³

Answer:

You can't solve this without a specific value of x.

Step-by-step explanation:

Well, all that the absolute value sign means, is that you work in them like parenthesis, but when you "open them up" no matter what, the result will be positive.

So, | x - 2 | - | x - 3 | is just a showing you that you are going to have a positive answer for x - 2, and you are going to have a positive answer for x - 3.

Now, since we don't have a specific value for x, just to simplify this even more, lets just quickly substitute x = 1, just for a reference, so:

| 1 - 2 | - | 1 - 3 | = | -1 | - | -2 |

                         = 1 - 2

                         = -1

Ok, so we got that, now we can go back to the original problem. Since we really don't have a specific value for x, we can't really simplify this any further. Maybe if you had a specific value or placeholder for x, then you would be able to solve this.