if a = 4 and b=3, what is the value of (a+b) (a-b)​

Answer:

x < -2

Step-by-step explanation:

its less than x, open circle

Answer:

x < -2

Step-by-step explanation:

Okay, so the dot is at -2 and is facing left. Left means less than, so, we know x is less than -2.

But we don't know if it's equal to or less than or just less than.

The dot is hollow, which in graphing means that it is not equal to or less than.

Therefore, the answer is x < -2

Brainliest please?  

The 99% confidence interval for the mean daily return on this stock is (-2.97, 1.52). The correct answer is Lower limit: - -2.973 - Upper limit: 1.515.

A certain brokerage house wants to estimate the mean daily return on a certain stock.

A random sample of 11 days yields the following return percentages.

-1.36, -2.85, 2.33, 0.46, 0.9, -1.94, -2.19, 1.14, 0.1, -2.2, -1.26.

Confidence level = 99%df

= n - 1

= 11 - 1

= 10α/2

= (1 - confidence level) / 2

= 0.01 / 2

= 0.005

From the t-distribution table with 10 degrees of freedom at α/2 = 0.005, we get t0.005 = 3.169.

Using the formula, the confidence interval is calculated as follows:

CI = X ± t0.005 * s / √n

Here, sample mean X = (-1.36-2.85+2.33+0.46+0.9-1.94-2.19+1.14+0.1-2.2-1.26) / 11

= -0.7290909091

Sample standard deviation s = sqrt([Σ(xi - X)²]/(n - 1))= 1.726805996

Approximately, 99% of the intervals constructed in this manner contain the true population parameter, mean daily return on this stock.

Lower limit: -2.973

Upper limit: 1.515

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Answer:

-18 + x = 11

x = 29

Step-by-step explanation:

To solve this, you can use the formula of a + b = c

\(-18 + x = 11\\-18 = 18\\11 + 18 = 29\\x = 29\)

Answer:

29

Step-by-step explanation:

Your equation can be -18+x=11. Since we don't know the number, we can use x. We are trying to find out a number that when it's added to -18, the answer will be 11.

Now, we solve the equation:

-18+x=11

x=11+18

x=29. Answer

To check this answer:

we can use our equation and substitute 29 for x.

-18+x=11

-18+(29)=11

11=11.

They are equal. Therfore, the answer is correct.

Answer:

4

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

E to A is 3 and D to A is 2 so you add the two together and get 5 which is B.

Let me know if I'm wrong.

Answer:

The measure of the arc RQ is 160°

Step-by-step explanation:

Let us use these rules to solve the question

In the given figure

∵ ∠RPQ is an inscribed angle subtended by arc RQ

∴ m of arc RQ = 2 × m∠RPQ

∴ m∠RPQ = 5x + 15

∴ m of arc RQ = 2 × (5x + 15)

→ Multiply the bracket by 2

∴ m of arc RQ = 2(5x) + 2(15)

∴ m of arc RQ = 10x + 30

∵ The measure of the circle = 360°

∵ The sum of the measures of arcs RQ, QP, and PR equals the measure

   of the circle

∵ m of arc QP = 6x - 12

∵ m of arc PR = 9x + 17

→ Add them and equate the sum by 360°

∴ 10x + 30 + 6x - 12 + 9x + 17 = 360

→ Add the like terms in the left side

∵ (10x + 6x + 9x) + (30 - 12 + 17) = 360

∴ 25x + 35 = 360

→ Subtract 35 from both sides

∴ 25x = 325

→ Divide both sides by 25 to find x

∴ x = 13

→ To find the measure of arc RQ substitute x by 13 in its measure

∵ m of arc RQ = 10(13) + 30 = 130 + 30

∴ m of arc RQ = 160°

∴ The measure of the arc RQ is 160°

slope intercept form: y=mx+b

y=3x+4

slope is also m

b is the y-intercept

answer:

slope is 3

y-intercept is 4

This shows that the food will only last 1 1/3 meals

Fractions are written as a ratio of two integers. Given the following

Total pounds of food bought = 24 pounds

Amount fed each per meal = 3/4 * 24 pounds = 18 pounds

Remains = 24 - 18

Remaining = 6 pounds

This shows that the food will only last 1 1/3 meals

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The curves are intersecting at (1, 1) and (-10, -4)

Nonlinear functions are the functions where the equations are not linear or the highest degree is more than 1. The following are some examples where the functions are not linear or non-linear. Ex. \(x^{2}\) + 4x -1

In the above question, a graphical representation of non-linear system of equations is given

We need to find the solution of this non-linear system of equations based on the graphical representation

We can find the solutions from the graph, wherever the curves are intersecting, that intersection point is known as the solution of the non-linear system of equations

We can clearly see that, the curves are intersecting at

(1, 1) and (-10, -4)

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The curves are intersecting at (1, 1) and (-10, -4)

Nonlinear functions are the functions where the equations are not linear or the highest degree is more than 1. The following are some examples where the functions are not linear or non-linear. Ex. \(x^{2}\) + 4x -1

In the above question, a graphical representation of non-linear system of equations is given

We need to find the solution of this non-linear system of equations based on the graphical representation

We can find the solutions from the graph, wherever the curves are intersecting, that intersection point is known as the solution of the non-linear system of equations

We can clearly see that, the curves are intersecting at

(1, 1) and (-10, -4)

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Answer:

D)  

5

11

This is because there were originally 12 apples and because she did not replace the apple she took out, she has a higher probability of getting a yellow apple.    Hope this helped   :)

Step-by-step explanation:

The system specifications may not be consistent if the router doesn't support the new address space. The reason is that the router must be compatible with the addressing scheme used by the system for proper communication.

If the router does not support the new address space, there might be issues with the system's performance or accessibility. The address space is the number of unique IP addresses that are available in a network. An IP address is required to identify each device on a network and to enable communication between devices.

With the increasing number of devices on a network, new address spaces are required to ensure that each device has a unique IP address. The compatibility of system specifications is a crucial aspect that must be considered when building a system. If the system specifications are not consistent, it might cause the system to malfunction, resulting in poor performance or accessibility issues. Thus, it is important to ensure that the router supports the new address space before integrating it into the system.

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Answer:

false

Step-by-step explanation:

Because the length of the sides are not the same

I think 29 minutes, hope this helps

The probability that the mean lifetime of 25 randomly selected tires of this type will exceed than 42,000 miles is 25.14.

To break this problem, we need to use the standard normal distribution, assuming that the distribution of tire continuances is roughly normal. We can regularize the value of 42,000 using the formula

z = ( x- μ)/ σ

where x is the value of interest( 42,000 long hauls), μ is the mean tire continuance( 40,000 long hauls), and σ is the standard deviation( 3,000 miles). Plugging in the values, we get

z = ( 42,000- 40,000)/ 3,000 = 0.67

Using a standard normal distribution table or calculator, we can find the probability that an aimlessly named tire will last further than 42,000 long miles by looking up the area to the right of z = 0.67 under the standard average wind. This probability is roughly 25.14.

thus, the probability that a tire named arbitrarily from this brand will last more than 42,000 miles is roughly 25.14.

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The correct question is given below-

A particular brand of tires lasts an average of 40,000 miles with a standard deviation of 3,000 miles. What is the probability a tire selected at random lasts more than 42,000 miles?

Answer:

f(3) = 11

Step-by-step explanation:

f (x)=3x+ 2

Let x= 3

f (3) =3*3+ 2

     = 9+2

     = 11

Answer:

f(3)= 3.3+2

=9+2

=11

Thanks hope it helps

Answer:

20

Step-by-step explanation:

20

Step-by-step explanation:

The total exterior angles of the polygon equals to 360°.

360÷18(the size of the angles each side has)

thus answer =20

Therefore, the compound interest of the annuity due of BD 400 paid each 4 months for 6.2 years at a nominal rate of 3% per annum is BD 40,652.17.

Compound interest of an annuity due can be calculated using the formula:A = R * [(1 + i)ⁿ - 1] / i * (1 + i)

whereA = future value of the annuity dueR = regular paymenti = interest raten = number of payments First, we need to calculate the effective rate of interest per period since the nominal rate is given per annum. The effective rate of interest per period is calculated as

:(1 + i/n)^n - 1 = 3/1003/100 = (1 + i/4)^4 - 1

(1 + i/4)^4 = 1.0075i/4 = (1.0075)^(1/4) - 1i = 0.0303So,

the effective rate of interest per 4 months is 3.03%.Next, we can substitute the given values in the formula:

A = BD 400 * [(1 + 0.0303)^(6.2 * 3) - 1] / 0.0303 * (1 + 0.0303)A = BD 400 * [4.227 - 1] / 0.0303 * 1.0303A = BD 400 * 101.63A = BD 40,652.17

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Answer:

The correct answer is C (24).

Therefore ,the heart beat the time per beat in units of seconds is 0.5s/beat.

A well-formed equation in algebra unites two variables with the equals sign to indicate the equality of the two terms. An equation, for instance, is any well-formed formula that consists of two expressions joined by the equals sign in English. An équation, on the other hand, is described as consisting of one or more variables in French.

Here,

Given: your heart rate is 120 beats per minute during strenuous exercise

Thus to calculate time per beat in units of seconds

We,

time  per second per beat =  total second in a minute /heart rate

time  per second per beat =60/120

time  per second per beat =1/2

time  per second per beat = 0.5 s/beat

Therefore ,the heart beat the time per beat in units of seconds is 0.5s/beat.

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The range of the function g(x) = |x - 12| - 2 is {y | y > -2}, indicating that the function can take any value greater than -2.

To find the range of the function g(x) = |x - 12| - 2, we need to determine the set of all possible values that the function can take.

The absolute value function |x - 12| represents the distance between x and 12 on the number line. Since the absolute value always results in a non-negative value, the expression |x - 12| will always be greater than or equal to 0.

By subtracting 2 from |x - 12|, we shift the entire range downward by 2 units. This means that the minimum value of g(x) will be -2.

Therefore, the range of g(x) can be written as {y | y > -2}, which means that the function can take any value greater than -2. In other words, the range includes all real numbers greater than -2.

Visually, if we were to plot the graph of g(x), it would be a V-shaped graph with the vertex at (12, -2) and the arms extending upward infinitely. The function will never be less than -2 since we are subtracting 2 from the absolute value.

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Answer:

The range is from 2 to infinity

We can see at the very bottom of The function it starts at 2,2

We can see the function going up forever on the graph

Assuming your teacher wants Interval Notation

The answer is

(2, positive Infinity symbol)

Different types of integer models refer to different formulations and restrictions applied to the variables in mathematical optimization problems. Here are brief explanations of three commonly used types of integer models: total integer model, 0-1 integer model, and mixed integer model.

1. Total Integer Model: In a total integer model, all variables are required to take integer values. This means that the solution must consist of only whole numbers, without any fractional or decimal values. For example, if a variable represents the number of units to produce, a total integer model would ensure that only whole units can be produced.

2. 0-1 Integer Model: In a 0-1 integer model, the variables are binary and can only take two values: 0 or 1. This formulation is often used for decision variables that represent choices or binary decisions, such as selecting or not selecting a particular option. For example, in a facility location problem, a 0-1 integer variable can represent whether a facility is open (1) or closed (0).

3. Mixed Integer Model: A mixed integer model allows a combination of integer and continuous variables in the optimization problem. Some variables can take fractional or decimal values (continuous), while others must take integer values. This formulation is useful when there is a need to model both discrete decisions and continuous quantities in the same problem. For example, in a production planning problem, the number of machines (integer) and the amount of raw material used (continuous) can be decision variables in a mixed integer model.

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The expected payout of the game is calculated as E(X) = 164.68

This is the term that is used to refer to the likelihood of an event occurring.

We have to solve for the probability first

The probability of 0

= 1 - the sum of all of the values

= 1 - 0.151 + 0.029 + 0.0007

= 1 - 0.1807

= 0.8193

Next we have to solve for the expected payout

The formula is given as

∑pi * xi

= 0.151 * $180 + 0.029 * $1000 + 0.0007 * 155000 + 0 * 0.8193

= 27.18 + 29 + 108.5 +0

= $164.68

E(X) = 164.68

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Answer:

Step-by-step explanation:

.3421

The coordinates of the image of triangle ABC after it is translated 6 units down are given as follows:

A'(1, -8), B'(9, -8), C'(5,-6).

The four translation rules are defined as follows:

The coordinates for triangle ABC are given as follows:

A(1, -2), B(9, -2), C(5,2).

The translation rule for a translation 6 units down is given as follows:

(x,y) -> (x, y - 6).

Hence the coordinates of the image are given as follows:

A'(1, -8), B'(9, -8), C'(5,-6).

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Answer:

17.5

Step-by-step explanation:

35℅ of 100 is 35 so 200 would be half that

Answer:

Hey!

Your answer is 17.5%!

Step-by-step explanation:

Can be written as...35/200

Now...

MULTIPLY THE NUMERATOR AND DENOMINATOR BY 100...

35/200 × 100/100

35×100/200 × 1/100

SOLVED!!!

▶ HOPE IT HELPED ◀

The second derivative of y with respect to x, d²y/dx², is 0 for the curve defined by the parametric equations x(t) = \(e^{3t}\) and y(t) = \(e^{4t}\) × et.

To find d²y/dx², we need to differentiate the parametric equations x(t) and y(t) with respect to t and apply the chain rule.

Given x(t) = \(e^{3t}\) and y(t) = \(e^{4t}\) × et, we can express y as a function of x by eliminating t. Solving x = \(e^{3t}\) for t, we get t = ln(x)/3. Substituting this into the equation for y, we have y(x) = \(e^{(4ln(x)/3) }\) × \(e^{(ln(x)/3) }\) = \(x^{4/3}\) × \(x^{1/3}\) = x.

Now, differentiating y(x) with respect to x, we have dy/dx = 1.

To find the second derivative, we differentiate dy/dx = 1 with respect to x, yielding d²y/dx² = 0.

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Answer: 4√2

The sides of a 45-45-90 triangle are in the ratio 1 : 1 : √2. In this case, the ratio is 4 : 4 : 4√2.

i hope this helped! :D