Evaluate the expression for a=1.6​, ​a=4, and a=68.

Expression: 3a+2.8
Help please!!!

The spread of the sampling distribution of x is smaller than the spread of the corresponding population distribution sampling distribution.

In the given question,

We have to find the spread of the sampling distribution of x is............... the spread of the corresponding population distribution sampling distribution.

As we know that,

The size of the sample as well as its dispersion affect the sampling distribution's spread. We calculate the sampling distribution's spread as the population's standard deviation divided by the sample size's square root.

So, the spread of the sampling distribution of x is smaller than the spread of the corresponding population distribution sampling distribution.

To learn more about sampling distribution link is here

brainly.com/question/13501743

#SPJ4

The right question is

The spread of the sampling distribution of x is .......... the spread of the corresponding population distribution sampling distribution.

larger than

smaller than

the same as

exactly 1/2

Answer:

A proportion describes the share of one value for a variable in relation to a whole. It is calculated by dividing the number of times a particular value for a variable has been observed, by the total number of values in the population.

So it is B! Mark me brainliest plzz!

Step-by-step explanation:

Answer:

the correct answer would be A

Step-by-step explanation:

brainlest pls

Answer: x = 2

\(8x=16\)   Original Equation

\(\frac{8x}{8}=\frac{16}{8}\)    Divide both sides by 8

\(x=2\)    Simplify

Answer: 279.36 cm

Step-by-step explanation: if you split the shape into 2 different shapes and do 6x 6x 7.2 =25.92 and then 2.8 x 7.2=20.16 then you add then together and get 279.36

Answer: 63.2 cm²

All work is shown in the picture below.

Answer:

1280

Step-by-step explanation:

We have,

Selling price (S.P) = Rs 960

Loss% = 25%

Now,

Find the cost price (C.P) :-

C.P = (S.P × 100)/(100 - loss)

= (960 × 100)/(100 - 25)

= 96000/75

= 1280

Hence,

Cost Price of the radio is Rs 1280

Answer:

1 3/4

Step-by-step explanation:

1 3/4

Answer:

7/4

Step-by-step explanation:

Multiplying fraction is so easy just multiply the nominators with each other. Then the denominators.

21 *1 =21 and 4 *3=12

21/12 =7/4 just simplify

The development of information applicable to activity that upholds by the fundamental elements of scientific inquiry is referred to as practical research.

In the given question we have to define practical in research.

The development of information applicable to activity that upholds by the fundamental elements of scientific inquiry—clearly specified research questions, reliable patterns of thought, methodical data collecting and analysis, and acceptable conclusions—is referred to as practical research.

Practical research aims to advance knowledge through scientific theories, concepts, and ideas in order to benefit society. Establishing hypotheses, gathering data, evaluating, etc. all serve practical research purposes.

To learn more about practical research link is here

brainly.com/question/18363528

#SPJ4

Answer:

5x^2 -4

Step-by-step explanation:

4x^2+1 +(x^2 -5)

5x^2 -4

Answer:

B. \((3x-4)(x+1)\)

Step-by-step explanation:

Based on the given data, there is evidence to suggest that the mean monthly income of the customers in the store is higher than P20 000.

The null hypothesis is that the mean monthly income of the customers in the store is P20 000, while the alternative hypothesis is that the mean monthly income is not P20 000. With a significance level of alpha = 0.5, a two-tailed t-test will be used to determine if there is sufficient evidence to reject the null hypothesis.

Using a t-test calculator, the calculated t-value is 7.07, which exceeds the critical t-value of 1.645. This indicates that there is sufficient evidence to reject the null hypothesis and accept the alternative hypothesis that the mean monthly income of the customers in the store is not P20 000.

However, it is important to note that this conclusion is only based on a sample of 90 customers and may not necessarily represent the entire population of the store's customers. A larger sample size may be needed to increase the accuracy and reliability of the results.

Visit here to learn more about Null- Hypothesis:

brainly.com/question/4436370

#SPJ11

Translate the word sentence into a number sentence.

9. Eight plus four is not equal to eleven

we have that

Eight plus four ------> 8+4

not equal -----> ≠

eleven -----> 11

therefore

the answer is

Answer:

1.69s^2h/3.

Step-by-step explanation:

New s = 1.3s

New volume = (1.3s)^2h /3

= 1.69s^2h/3.

Answer: look at explanation <3

Step-by-step explanation:

Steps to find the equation of a line from two points:

Find the slope using the slope formula

Use the slope and one of the points to solve for the y-intercept (b).

One of your points can replace the x and y, and the slope you just calculated replaces the m of your equation y = mx + b. Then b is the only variable left. Use the tools you know for solving for a variable to solve for b.

Once you know the value for m and the value for b, you can plug these into the slope-intercept form of a line (y = mx + b) to get the equation for the line.

Answer:

600

Step-by-step explanation:

Answer:

2a - 1

Step-by-step explanation:

I can only simplify

-3a + 2 + 5a - 3

2a + 2 - 3

2a - 1

Answer:

2a-1

Step-by-step explanation:

-3a+2+5a-3

Add like terms

-3a+5a+2-3

2a-1

(+ turns into minus because +2-3 equals a negative number)

The congruency relationship which hold true after transformation is

YZ ≅ AB

What is congruent ?

In mathematics, the term "congruent" refers to figures and shapes that can be flipped or rearranged to match up with other ones. These forms can be mirrored to produce related shapes.

Explanation:

A translation is known as a rigid transformation.  This is because it preserves congruence.  Since CAB is created from XYZ, this tells us that:

X corresponds to C; Y corresponds to A; Z corresponds to B; XY corresponds to CA; YZ corresponds to AB; and XZ corresponds to CB.

Since the triangles are congruent, the corresponding pieces are congruent as well.

Out of these corresponding congruent pieces of triangles, the only one in our options is YZ ≅ AB.

Hence the answer is YZ≅AB.

To learn more about congruent click on the link below

https://brainly.com/question/1675117

#SPJ4

The equation of a straight line is written as

y = mx + c

Where

m represents slope

c represents y intercept

The given equation is expressed as

3x + y = 3

y = 3 - 3x

y = - 3x + 3

Comparing the above equation with the slope intercept equation,

y intercept = 3

The x intercept is the value of x when y = 0

Putting y = 0 in the equation, it becomes

0 = - 3x + 3

3x = 3

x = 3x/3

x = 1

x intercept = 1

Answer:

4739 CDs

Step-by-step explanation:

Given the function that models the rate at which the disc is sold expressed as;

R(t)=20,000e^−0.12t

t is the number of weeks since the CD was first released

We are to look for the number of CDs that are expected to be sold during the first 12 weeks after the release. To do this, you will simply substitute t = 12 into the modeled function and get R(12) as shown;

R(t)=20,000e^−0.12t

R(12)=20,000e^−0.12(12)

R(12)=20,000e^−1.44

R(12)=20,000(0.2369)

R(12) = 4738.56

Hence the total number of CDs expected to be sold to nearest thousand is 4739 CDs

Answer:

127,000

Step-by-step explanation:

you take the integral from 0 to 12 of R(t)

Answer:

your P will be equal to 8 x

Answer:

Step-by-step explanation:

If the population of the town last year was 2000 + x, then this year's population, after an increase of 25 people, can be represented by the expression:

(2000 + x) + 25

Answer:

(1, -2)

Step-by-step explanation:

equate the two answers (make them equal to each other). Then solve.

7x + 11 = -3x + 1

7x + 3x = 1 - 11

10x = -10

x = 1

Plug "x" in to one of the equations to find "y" (I'm using equation 2)

y = -3(1) + 1

y = -3 + 1

y = -2

final answer: (1, -2)

The value of c that makes the given function a probability density function is 3/2.

A probability density function is a function that describes the likelihood of a random variable taking on a specific value within a given range.

In order for a function to be a probability density function, it must satisfy certain conditions, such as being non-negative and integrating to 1 over its domain.

In this problem, we are given a function:

c(5x - 4 - x²)if 1 ≤ x ≤ 4, and 0 otherwise.

We need to find the value of c that will make this function a probability density function. That means we need to check whether the function is non-negative and integrates to 1 over the interval [1, 4].

First, let's check whether the function is non-negative. Since c is a constant, we just need to look at the expression inside the parentheses.

For this expression to be non-negative, we need to find its roots:5x - 4 - x² = 0⇒ x² - 5x + 4 = 0⇒ (x - 1)(x - 4) = 0The roots are x = 1 and x = 4.

We can see that the expression inside the parentheses is negative between these two roots, and positive outside this interval.

Therefore, the function is only non-negative for values of x between 1 and 4.Next, let's check whether the function integrates to 1 over the interval [1, 4].

We can do this by evaluating the integral:

integral(1, 4, c(5x - 4 - x²)) = 1

We can simplify this expression by pulling the constant c outside the integral and then integrating the expression inside the parentheses:

integral(1, 4, 5x - 4 - x²) = 1

Using the power rule of integration, we get:

[(5/2)x² - 4x - (1/3)x³]1⁴ = 1

Simplifying this expression, we get:

(5/2)(4²) - 4(4) - (1/3)(4³) - (5/2)(1²) + 4(1) + (1/3)(1³) = 1

Solving for c, we get:

c = 3/2

So the value of c that makes the given function a probability density function is 3/2.

For more such questions on probability, click on:

https://brainly.com/question/30390037

#SPJ8

The ordered pairs of the given rational function are:

(-2, -5¹/₂), (-1, -5²/₃),(0, -1), (1, -5),(-1,

In mathematics, an ordered pair (a, b) is a pair of objects. The order in which objects appear in pairs is important.

The ordered pair (a, b) is different from the ordered pair (b, a) unless a = b. (By contrast, the unordered pair {a, b} corresponds to the unordered pair {b, a}.)  

We are given a rational function as:

f(x) = -3x + (2/(x - 2))

Now, to get the ordered pair, we can use different values of x and find the corresponding value of y.

Thus:

At x = 0, we have:

f(x) = -3(0) + (2/(0 - 2))

f(x) = -1

At x = 1, we have:

f(x) = -3(1) + (2/(1 - 2))

f(x) = -5

At x = -1, we have:

f(x) = -3(-1) + (2/(-1 - 2))

f(x) = -5 - 2/3

= -5²/₃

At x = -2, we have:

f(x) = -3(-2) + (2/(-2 - 2))

f(x) = -5 - 1/2 = -5¹/₂

Read more about Ordered Pairs at: https://brainly.com/question/1528681

#SPJ4

To find dz/dt using the chain rule, we need to calculate the derivatives of z with respect to x and y separately, and then multiply them by the derivatives of x and y with respect to t.

Given:

z =  \(cosh^{2} (xy)\)

x = (1/2)t

y = \(e^{t}\)

Let's start by finding the partial derivatives of z with respect to x and y:

∂z/∂x = \(2cosh(xy) * sinh(xy) * y\)  (using the chain rule)

∂z/∂y = \(2cosh(xy) *sinh(xy)*x\)    (using the chain rule)

Next, let's find the derivatives of x and y with respect to t:

dx/dt = 1/2

dy/dt = \(e^{t}\)

Finally, we can use the chain rule to find dz/dt:

dz/dt = (∂z/∂x)(dx/dt) + (∂z/∂y)(dy/dt)

      = \(2cosh(xy) *sinh(xy)*y*(1/2) + 2cosh(xy)*sinh(xy)*x*e^{t}\)

Now, substitute the given expressions for x and y:

\(dz/dt = 2cosh((1/2)t*e^{t} * sinh((1/2)t*e^{t} *(1/2)* + 2cosh((1/2)t*e^{t} *sinh((1/2)t*e^{t} *((1/2)t)\)

Simplifying further, we have:

\(dz/dt = cosh((1/2)t*e^{t} *sinh((1/2)t*e^{t})* e^{t} + cosh((1/2)t* e^{t}*sinh((1/2)t*e^{t}* ((1/2)t)\)

This is the expression for dz/dt using the chain rule with the given values of x and y.

To know more about chain rule refer here:

https://brainly.com/question/31585086?#

#SPJ11

Answer:

{-2, 5}

Step-by-step explanation:

I used a calculator, pls let me know if im incorrect

x^2 − 3x − 10 = 0

Step 1: Factor left side of equation.

(x+2) (x−5) = 0  

Step 2: Set factors equal to 0.

x + 2 = 0 or x − 5 = 0

x = −2 or x = 5  

Those are the steps that the calculator said to do ^

Answer:

you got this

Step-by-step explanation:

The coordinate (20, -32), the reflection of the coordinate over the x-axis is (20, 32)

If a coordinate (x, y) is reflected across the x-axis, the resulting coordinate after reflection is (x,-y)

Note that the y-ccordinate is negated after the reflection.

Given the coordinate (20, -32), the reflection of the coordinate over the x-axis is (20, 32)

Learn  more on reflection here: https://brainly.com/question/26642069

#SPJ1

Answer:

The coordinates of the image triangle will be:

Please also check the attached figure.

The green triangle represents the image triangle.

Step-by-step explanation:

We know that when we reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate reveres its sign.

Thus,

The rule of reflection of the point P(x, y) across the x-axis is:

P(x, y) → P'(x, -y)

In the attached figure, let the coordinates of the triangle are:

Using the rule of reflection across the x-axis:

P(x, y) → P'(x, -y)

Thus, the coordinates of the image triangle will be:

A(-3, 1) → A'(-3, -1)

B(-3, 3) → B'(-3, -3)

C(-1, 3) → C'(-1, -3)

Therefore, the coordinates of the image triangle will be:

Please also check the attached figure.

The green triangle represents the image triangle.