In constructing 98% confidence intervals for means, what do we expect will be true over the long run?

Answer:

[tex]\sf \dfrac{x+2}{x}[/tex]

Step-by-step explanation:

Simplifying the expression:

 1. Factorize each expression.

     x² + 8x + 15

   Sum = 8

  Product = 15

  Factors = 3 , 5  {When we add 3 & 5 we get 8 and when we multiply 3*5, we get 15}

  x² + 8x + 15 = x² + 3x + 5x + 15

                     = x(x + 3) + 5(x + 3)

                     = (x + 3)(x + 5)

x² - 2x - 15

 Sum = -2

Product = -15

Factors = 3 , (-5)  {When we add 3 + (-5) =2 and when we multiply, 3*(-5) = -15}

x² - 2x - 15 = x²  + 3x - 5x - 15

                 =x(x + 3) -5(x + 3)

                 = (x + 3)(x - 5)

x² + 5x = x( x + 5)

x² - 3x - 10

Sum = -3

Product = -10

Factors = 2 , (-5)  {When we add 2 +(-5) = -3 and when we multiply 2 *(-5) = -10}

x² - 3x - 10 = x² + 2x - 5x - 10

                 =x(x + 2) - 5(x + 2)

                 = (x + 2)(x - 5)

2. Use KCF method and simplify.

  K - keep the first fraction

  C - change division to multiplication

 F -  Flip the second fraction.

[tex]\sf \dfrac{x^2 + 8x + 15}{x^2 - 2x - 15} \ \div \ \dfrac{x^2 + 5x}{x^2 - 3x - 10}=\dfrac{x^2 + 8x + 15}{x^2-2x - 12}*\dfrac{x^2 - 3x - 10}{x^2 + 5x}[/tex]

                                              [tex]\sf = \dfrac{(x +3)*(x +5)}{(x+3)(x - 5)}*\dfrac{(x + 2)(x - 5)}{x(x+5)} \\\\= \dfrac{x + 2}{x}[/tex]

The equation of the line containing (- 4,5) and perpendicular to the line 5x - 3y = 4 is y = -3 / 5 x + 13 / 5

The equation of a line can be represented as follows:

y = mx + b

where

Therefore, the equation passes through (-4, 5) and perpendicular to 5x - 3y = 4

Hence,

perpendicular lines follows the rule below:

m₁m₂ = -1

Hence,

5x - 3y = 4

5x - 4 = 3y

y = 5/ 3 x - 4 / 3

m₁ = 5 / 3

5/3 m₂ = -1

m₂ = - 3 / 5

Hence,

using (-4, 5)

5 = - 3 / 5 (-4) + b

5 = 12 / 5 + b

b = 5 - 12 / 5 = 25 - 12 /5 = 13 / 5

Therefore,

y = -3 / 5 x + 13 / 5

learn more on equation of a line here: https://brainly.com/question/10727767

#SPJ1

Answer:

  3x +5y = 13

Step-by-step explanation:

The equation of a perpendicular line through a given point can be obtained by swapping the x- and y-coefficients of the original line's equation, and negating one of them. The constant in the equation needs to be chosen so the equation will be true at the given point.

Swapping the coefficients of the given equation, we have ...

  3x -5y = c . . . . . for some constant c

Negating the y-coefficient gives a perpendicular line:

  3x +5y = c

We want the equation to be true for (x, y) = (-4, 5), so the constant needs to be ...

  3x +5y = 3(-4) +5(5) = -12 +25 = 13

The equation of the perpendicular line is ...

  3x +5y = 13

__

Additional comment

This process works for equations given in any form. If you start with point-slope form or slope-intercept form, some manipulation of the result may be required to get to the form you want. Standard-form or general-form equations are the easiest to apply this method to.

Note that equations in standard form want to have a positive leading coefficient. That is why we chose to change the sign of the y-coefficient, rather than the x-coefficient.

The equation of Daredevil Danny's jump in vertex form is y = -0.32(x - 25)^2 + 32

The graph of Daredevil Danny's jump is added as an attachment

A quadratic function is represented as:

y = a(x - h)^2 + k

From the graph, we have:

So, we have:

y = a(x - 25)^2 + 32

Substitute the value of the x-intercept

0 = a(15 - 25)^2 + 32

Subtract 32 from both sides

a(15 - 25)^2 = -32

Solve for a

a = -0.32

Substitute a = -0.32 in y = a(x - 25)^2 + 32

y = -0.32(x - 25)^2 + 32

Expand the exponent

y = -0.32(x^2 -50x + 625) + 32

Expand the bracket

y = -0.32x^2 + 16x - 200 + 32

This gives

y = -0.32x^2 + 16x - 168

Hence, the values of the coefficients a, b and c are -0.32, 16 and -168

Yes, he jumped successfully

This is so because his maximum height (i.e. the vertex of his jump) is higher than the vertex of the hoop

Read more about quadratic functions at:

https://brainly.com/question/22679014

#SPJ1

Answer:

72 × 3 = 216m

216 m is the combined length

1st transformation: A vertical translation of the figure down by 8 units

2nd transformation: Shows a reflection on both axis and vertical translation up the plane by 8 units

Transformation is a way of changing the position of an object on an xy-plane.

For the translation

(x, y)-> (x, y-8)

It shows a vertical translation of the figure down by 8 units while the translation;

(x, y - 8) -> (-x, -y)

shows a reflection on both axis and vertical translation up the plane by 8 units

Learn more on transformation here: https://brainly.com/question/1462871

#SPJ1

Answer: Option (2)

Step-by-step explanation:

There is a double root at x=-1, so there is a factor of [tex](x+1)^2[/tex].

Also, as x approaches both positive and negative infinity, the graph approaches negative infinity, so the leading coefficient is negative.

Answer:

D. 14 units

Step-by-step explanation:

d = [tex]\sqrt{(x_{2}-x_{1})^{2}+(y_{2}-x_{1})^{2} }[/tex]

= [tex]\sqrt{(-5 - (-5))^{2} + (-6 - 8)^{2} }[/tex]

= [tex]\sqrt{0^{2} + -14^{2} }[/tex]

= [tex]\sqrt{0 +196 }[/tex]

= [tex]\sqrt{196}[/tex]

= 14

Answer: 25,0.

Step-by-step explanation:

∡B=27°     ∡C=82°      b=12      a=?

∡A=180°-(27°+82°)=180°-109^°=71°.

[tex]\frac{a}{sinA} =\frac{b}{sinB} \\a=\frac{b*sinA}{sinB}=\frac{12*sin71^0}{sin27^0}=\frac{12*0,9455}{0,454} \approx25,0[/tex]

24 different ways can they line up to receive their championship rings.

What is a permutation mean in math?

What are permutations used for?

Given,

            No. of captains of the football team = 4

So,

         4 ways we can line up  their championship rings = (4,4)

                  4 ×3 ×2 ×1  = 24

Therefore, 24 different ways can they line up to receive their championship rings.

Learn more about permutation

brainly.com/question/1216161

#SPJ4

Using translation concepts, the graph of g(x) is given as follows:

It goes through (2, 10), has a vertex at (5, 1), and goes through (8, 10).

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction in it's definition.

In this problem, the parent and translated functions are given, respectively, by:

The transformations are as follows:

f(x) has vertex at (0,0), hence g(x) will have the vertex at (5,1). When x = 2, g(x) = (2-5)^2 + 1 = 10, hence the correct statement is:

It goes through (2, 10), has a vertex at (5, 1), and goes through (8, 10).

More can be learned about translation concepts at https://brainly.com/question/4521517

#SPJ1

The measure of ∠STR in the isosceles triangle is 24°

What is an isosceles triangle?

A triangle having two sides of equal length is termed as an isosceles triangle. The base angles of an isosceles triangle are also equal in measure. The fact that the perpendicular bisector of the base and the angle bisector of the vertex angle are the same is another crucial characteristic of an isosceles triangle. We refer this as Isosceles Triangle Theorem.

What is the value of angle STR?

It is given that in isosceles triangle SQT,

∠STQ = 48°

Since, the line TR is the angle bisector of angle STQ, we have,

∠STR = ∠RTQ

And, ∠STR + ∠RTQ = ∠STQ

Let ∠STR be x, the, we get,

x + x = ∠STQ

⇒ 2x = 48°

⇒ x = 24°

Learn more about isosceles triangle here:

https://brainly.com/question/2456591

#SPJ4

Answer:

None of these

Step-by-step explanation:

None of this expressions are equivalent. But if the original polynomial is 9x^2-4, then answer would be (3x+2)(3x-2).

Using formula (a+b)(a-b)=a^2-b^2 , it follows:

(3x+2)(3x-2)=(3x)^2-2^2=9x^2-4

Using the Speed-Distance-Time relation, the Dolphin's rate in Feet per hour is 221,760 ft/hr.

Given, we have the distance travelled by dolphin is 665,280 feet and time is 3 hours.

s = d/t = 665.280/3 = 221,760 feet per hour

Know more about Speed-Distance-Time relation with the help of the given link:

https://brainly.com/question/553636

#SPJ4

Answer: The correct answer is choice A.

Step-by-step explanation:

This is because the triangles have the same angles, but are scaled differently.  Thus because of the scale, there can be no correlation between the sides. Because the triangles share point E you can see that both triangles share the same angle but also notice how lines CD and AB are parallel. This makes all angles identical proving the triangles are the same but different sizes. Concluding that choice A is correct.

The system of linear inequalities to represent this situation. is given as-

9p <= 480

a >= 8s

p = a + s

Expressions with linear inequalities compare any two values using inequality symbols like "<," ">," "<=," or ">=." These values could be either numerical, algebraic, or both.

If the linear inequality is larger than or less than but not equal to, a dashed line appears on the graph. On the other hand, a solid line always appears in linear equations. Linear equations lack shaded sections, whereas linear inequalities do.

According to the question,

The buses can carry a maximum of 480 people.

These people include adults as well as students.

Let 'p' represents the total number of people in the bus.

Let 'a' represents the number of adults in the bus.

Let 's' represents the number of students in the bus.

Thus,

p = a + s.

As, there must be a minimum of one adult for every 8 students.

a >= 8s

and,

9p <= 480

Therefore, the system of linear inequalities are found.

To know more about the linear inequality, here

https://brainly.com/question/11897796

#SPJ4

The solution to the linear expressions are:

The solution to linear expression is determined by taking into consideration the arithmetic operations used in each linear expression.

From the information given:

a. $18.79 + $2.11 + ‐$1.92 + $17.28

By rearrangement:

= $18.79 + $2.11 + $17.28 ‐$1.92

= $36.26

b. $7.45 + ‐$24.45 + $74.17 + ‐$76.52

By rearrangement:

= $7.45  + $74.17 ‐ $24.45 ‐ $76.52

= -$19.35

c.  $98.45 − $10.63 + $2.82 − $20.26

By rearrangement:

= $98.45 + $2.82 − $10.63 − $20.26

= $70.38

Learn more about solving linear expressions here:

https://brainly.com/question/2030026

#SPJ1

You have the correct answer. Apply a 180 degree rotation around the point (0,2)

Reason:

We'll connect corners between figures A and B.

Draw a line from the upper right corner of figure A to the lower left corner of figure B. This line is in red (see diagram below).

Draw another line from the lower right corner to the upper left corner. This line is in blue.

The red and blue lines intersect at the center of rotation (0,2)

The line segments constructed consist of endpoints of "before" and "after". For instance, the upper right corner in figure A rotates to the lower left corner of figure B. This happens because of the 180 degree rotation.

Note: You can do this rotation either clockwise or counterclockwise, and you would get the same result.

Answer:

a view from the side.

"the parts are shown in the sectioned side view"

The inverse of the statement is M be the point on PQ since PM is congruent to QM than M is midpoint on the PQ.

Inverse of the statement means that explain the condition in reverse way or vice versa.

Since, M is the midpoint of PQ, then PM is congruent to QM.
Proving in reverse way, let m be the point between P and Q the distance M from P is equal to the distance from M to Q. Which implies that M lies as the mid of the P and Q.

Thus, the inverse of the statement is M be the point on PQ since PM is congruent to QM than M is midpoint on the PQ.

Learn more about inverse here:
https://brainly.com/question/5338106

#SPJ1

With the help of trigonometric function, the above problems have been calculated. See explanation below.

The term "trigonometric function" refers to functions that are periodic in nature and that shed light on how a right-angled triangle's angles and sides relate to one another.

The solutions to x in the respective problems is given as follows:

1) x = 5 /Sin(30°)

x = 10

!) Sin(45°) = 4/x

x = 4/sin(45°)

x = 4√2

I) Cos(45°) = √3 / x

x = √3 / Cos(45°)

x = √6

E) Tan(60°)

= (3√3) / x

x = (3√3) / 3

W) In trigonometry, every right-triangle that is isosceles in nature, the angle made by the legs and the hypotenuse will always equal 45°.

x = 45°

N) x² + x² = (7√2)²

x = 7

V) Tan(60°) = 7 / x

x = 7√3/3

K) x² + x² = (9)²

x = 9/√2

Y) Sin(60°) = 7√3/x

x = 14

M) Sin(30°) = x/11

x = 11/2

T) Sin(45°) = x/√10

x = √5

A) x + 2x + 90° = 180°

x = 30°

O) Sin(45°) = √2 / x

x = 2

R) Tan(30°) = x / 4

x = 4/√3

= 4√3 / 3

S) Sin(60°) = x / (10/3)

x = (5√3) / 3

Learn more about Trigonometric functions at:

https://brainly.com/question/14421002

#SPJ1

Answer:

16 sq. yds

Step-by-step explanation:

1. Split the shape into 2

The small square is 2(2) = 4

The  bigger rectangle is 3(4) = 12

4 + 12 = 16 sq. yds

The total dollar amount of sales is $150,000

What is the sales amount achieved by the salesman to earn a commission of $3,000?

To compute the portion of total sales earned as commission, we simply  multiply the sales amount recorded  by the percentage of commission which is 2%

sales commission=sales amount*commission rate

sales commission=$3,000

sales amount=unknown(assume it is X)

commission rate=2%

$3,000=X*2%

X=$3000/2%

X=$150,000

https://brainly.com/question/9090090

#SPJ1

Answer:

7[tex]\sqrt{2}[/tex]

Step-by-step explanation:

the diagonal d divides the square into 2 right angles.

using Pythagoras' identity in one of the right triangles , then

d² = 7² + 7² = 49 + 49 = 98 ( take square root of both sides )

d = [tex]\sqrt{98}[/tex] = [tex]\sqrt{49(2)}[/tex] = [tex]\sqrt{49}[/tex] × [tex]\sqrt{2}[/tex] = 7[tex]\sqrt{2}[/tex]

Answer:

c =7√2

Step-by-step explanation:

using the Pythagorean theorem we solve the diagonal ,where the two sides are given to find the hypotenuse.

c² =a² + b²

where c is the diagonal (hypotenuse fot thr triangle)

a and b are the legs (sides)

c² =7²+7²

c²= 98

c= √98

c=√49.√2

c=7√2

Answer:

s(t) = -4.9t² + 39.2t

Step-by-step explanation:

Given the projectile motion of an object can be modeled using s(t) = gt2 + v0t + s0, where g is the acceleration due to gravity, t is the time in seconds since launch, s(t) is the height after t seconds, v0 is the initial velocity, and s0 is the initial height. The acceleration due to gravity is –4.9 m/s²

Given

g = -4.9m/s²

v0 = 39.2m/s

s0 = 0m (the initial height)

On substituting into the formula;

s(t) = gt² + v0t + s0

s(t) = -4.9t² + 39.2t + 0

s(t) = -4.9t² + 39.2t

This gives the equation that models the height

Answer: -5

Step-by-step explanation:

     Slope can be found with change in y over change in x.

           [tex]\displaystyle \frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]

     Let (10, 4) be point 1 and (2, 44) be point 2.

           [tex]\displaystyle \frac{y_{2} -y_{1} }{x_{2} -x_{1} }[/tex]

           [tex]\displaystyle \frac{44-4}{2-10}[/tex]

           [tex]\displaystyle \frac{40}{-8}[/tex]

           [tex]\displaystyle \frac{40}{-8}[/tex]

           -5

Answer: -5/21.

Step-by-step explanation:

[tex]\frac{2}{5}*[\frac{-3}{7} +(\frac{-1}{6})]=\frac{2}{5} *(-\frac{3}{7} -\frac{1}{6}) =\frac{2}{5}*(-\frac{3*6+1*7)}{7*6} )=\frac{2}{5}*(-\frac{18+7}{42})=\frac{2}{5}*(-\frac{25}{42})=-\frac{5}{21} .[/tex]

Good luck an' have a nice day!

Answer:

Step-by-step explanation:

Answer:

Hence, 0.041 can be expressed as [tex]$4.1 \times 10^{-2}$[/tex].

Step-by-step explanation:

- Given 0.041

- Use given, move the decimal point so that first factor is greater than or equal to 1 but less than 10 .

- Then count n and write in scientific notation.

Step 1 of 1

Consider 0.041

[tex]$$\Rightarrow 4.1$$[/tex]

Decimal has moved to 2 places at right.

The power will be negative as original no. is less than 1 .

So, [tex]$4.1 \times 10^{-2}$[/tex]

[tex]$$0.041=4.1 \times 10^{-2} \text {. }$$[/tex]