He has 2 pens. His friend gives him 2 more pens. How many pens he has?

Answer:

5/12, 5/9, 2/3, 5/6, 6/5

Step-by-step explanation:

5/12= 0.41666667, 5/9= 0.55555556, 2/3= 0.66666667, 5/6= 0.83333333, 6/5= 1.2

Consequently, the person's weight is roughly 26.5 pounds of fat (rounded to the nearest tenth).

By determining the value of a single unit or quantity and then scaling that value up or down to determine the value of another quantity, the unitary method is a mathematical strategy used to solve problems. According to the unitary method's guiding concept, if one quantity or unit has a certain value, then a predetermined number of those same quantities or units will have a proportionate value. For instance, 5 apples would cost $5 if 1 fruit cost $1.

given

We can use the person's weight and body fat proportion to determine how many pounds of body fat they have. We can commence by calculating the decimal weight of the body fat:

weight of body fat Equals body fat percentage * weight

= 0.163% * 163 lbs.

= 26.509 lbs.

Consequently, the person's weight is roughly 26.5 pounds of fat (rounded to the nearest tenth).

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The number of functions ,

(a) that are one-to-one are 0.

(b) that assign 0 to both 1 and n are 2ⁿ⁻²,

(c) that assign "1" to exactly one of positive-integers less than n are 2.(n-1).

Part(a) : We have to find total number of "one-to-one" functions from the set {1,2,......,n} to {0,1}.

⇒ If n=1 then there are 2 possible functions depending whether 1 is mapped to "0" or "1" ,So there are 2 such functions.

⇒ If n=2 then domain is {1,2} then there are 2 choices for first element in domain.

Then, since one choice is taken there is one choice for second element in the domain. So, if n=2 we have 2×1 = 2 functions.

⇒ If value of n is greater than 2 then domain will be {1,2,....n} then only two value of this domain will be mapped to codomain {0,1} to provide a one-to-one function and

So, domain will not be used fully so there does not exist any one-to-one function.

Part(b) : Every element in the domain {1, 2, . . . , n} has two options in  codomain {0, 1},

So, there are total of "2n" functions from domain to co-domain.

Since, the function assigns 0 to both 1 and n.

There are "n-2" elements left in domain which can be assigned 0 or 1.

So, for "n-2" elements in domain and there are "2ⁿ⁻²" functions from domain to codomain.

Part(c) : The domain set has "n" elements and codomain set has "2" elements.

So, each of "n" elements from domain has 2 choices in function and thus we get "2n" total functions.

There are "n-1" elements less than "n" in domain.

Now, by the condition that exactly "1" positive-integer less than "n" maps to "1".

So, all other remaining less than n (i.e. n-2) must be map to 0.

We find this number in ⁿ⁻²C₁ ways = n-2;

So, total number of ways in which elements less than "n" can be mapped is = n-2(mapped to 0) +1(mapped to 1) = n-1

Also, "n" can be mapped to either "0" or "1" which means., nth element have two-choices.

So, there are 2.(n-1) possible functions.

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Answer:

(1,2)

Step-by-step explanation:

We are given the following system of equations:

y = -x + 3

y = 4x - 2

And we want to solve it, with the answer in an ordered pair.

Because both systems are equal to y, we can set both of the equations equal to each other, and solve for x in that way.

This is possible due to transitivity, which states that if a=b, and b=c, then a=c.

Hence,

-x + 3 = 4x - 2 (same as y=y)

We can add x to both sides.

3 = 5x - 2

Add 2 to both sides.

5 = 5x

Divide both sides by 5.

1 = x

Now, we can use this value to find y.

Substitute 1 as x in either y = -x + 3 or y = 4x - 2

Taking y = -x + 3 for instance:

y = -1 + 3 = 2

So, we now that x=1, y=2.

As an ordered pair, that is (1,2).

Answer:

Matt would walk 8 miles in to hours.

Step-by-step explanation:

15 minutes is 1/4 of an hour, meaning it would be 1/8 of 2 hours.

1 mile times 8 = 8 miles

Hope that helps!

Answer:

f'(x) = -6x^2

f'(-5) = -150

f'(0) = 0

f'(√17) = -102

The most likely to produce invalid statistical analysis of numeric measures is Pain rating as: none = 0; slight = 1; much = 2,  as it is an ordinal scale of measurement, which does not have equal intervals between the categories. So, the correct answer is B).

It means that the differences between the categories are not necessarily equivalent, and therefore, any statistical analysis based on this scale may not accurately reflect the true relationship between variables.

The other options (blood pressure in mmHg, oxygen saturation in percentage, neonatal birth weight in kilograms) are measured on interval or ratio scales, which have equal intervals between values and can be used for meaningful statistical analysis. so, the correct option is B).

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____The given question is incomplete, the complete question is given below:

Which of the following numeric measures would be most likely to produce invalid statistical analysis?A)Analysis of patients' blood pressures in mmHgB)Pain rating as: none = 0; slight = 1; much = 2C)Assessment of oxygen saturation in percentageD)Analysis of neonatal birthweight in kilogr

Answer:

m₆ = 9375

Step-by-step explanation:

Given sequence is

[tex]m,_i = -3(-5)^{i - 1}[/tex]

To find the 6th term, all you have to do is substitute i = 6 and compute

For i = 6 we get

[tex]m_6 = -3(-5)^{6 - 1}\\= -3(-5)^5\\\\= -3(-3125) \\\\= 9375[/tex]

A negative number raised to an odd number is negative that is why (-5)⁵ is negative

The sampling distribution of the sample mean is approximately normal for large sample sizes, regardless of the distribution of the population is the best definition of the Central Limit Theorem. So the option e is correct.

The Central Limit Theorem, which states that the distribution of sample means approaches a normal distribution as the sample size increases. This means that the sample mean will be normally distributed, even if the population from which the sample is drawn is not normally distributed. This is useful because it can be used to make inferences and predictions about the population based on the sample data. So the option e is correct.

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The complete question is:

Which one of the following statements is the best definition of the Central Limit Theorem?

(a) In large populations, the distribution of the population mean is approximately normal.

(b) For non-normally distributed populations, the sampling distribution of the sample mean will be approximately normal, regardless of the sample size.

(c) If the distribution of the population is non-normal, it can be normalized by taking a large sample size.

(d) For large sample sizes, the sampling distribution of the population mean is approximately normal, regardless of the distribution of the population.

(e) The sampling distribution of the sample mean is approximately normal for large sample sizes, regardless of the distribution of the population.

Answer:

Sarah earns R6 100 in total for her work to the value of R12 000.

Step-by-step explanation:

To calculate Sarah's earnings, we need to break down her income into two parts: the commission she earns on income up to R5 000, and the bonus commission she earns on income above R5 000.

Commission on income up to R5 000:

Sarah's basic salary is R3 000 per month, and she earns 20% commission on income up to R5 000. So for the first R5 000 of income, Sarah's commission is:

[tex]\text{Commission on income up to} \ R5, 000 = 20\% \ \text{of} \ R5, 000 = R1 ,000[/tex]

Bonus commission on income above R5 000:

Sarah also receives a 10% bonus on top of the normal commission rate on earning above R5 000. So for the amount earned above R5 000, her commission is:

[tex]\text{Commission on income above} \ R5, 000 = (20\% + 10\%) of (R12, 000 - R5, 000) = 30\% \ \text{of} \ R7, 000 = R2 ,100[/tex]

Total earnings:

Sarah's total earnings are the sum of her basic salary and the commission she earns:

Total earnings = Basic salary + Commission on income up to R5 000 + Commission on income above R5 000

[tex]\text{Total earnings} = R3, 000 + R1 ,000 + R2 ,100[/tex]

[tex]\text{Total earnings} = 6,100[/tex]

Therefore, Sarah earns R6 100 in total for her work to the value of R12 000.

a. Histogram shows tip amounts ranging between $6 and $25, skewed to the right with a longer tail of higher tips.

b. Increasing the $8 tip to $18 would increase the mean since total tip amount increases by $10 spread out over 60 customers. Median won't be affected since changing one value does not alter the middle value.

a. The histogram shows that Elizabeth received a range of tip amounts, with the majority of tips falling between $6 and $25. The distribution is skewed to the right, with a longer tail of higher tip amounts.

b. i. The mean would increase because the total tip amount would increase by $10, and this increase would be spread out over the 60 customers.

ii. The median would not be affected because it is the middle value when the data is ordered, and changing one value does not change the middle value.

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Answer:

28.05$

Step-by-step explanation:

The game got a discount of 15%.
New price is   (30$) ( 0.85 )  =  25.5$   (since the discount is 15% you only pay for the 85% of the original price)

Then an increase of 10%. this is:
New price:   25.5$ (1.10) = 28.05

New price is 28$ with 5 cents

a) The sum of x and 4 equals 7: x + 4 = 7

b) The difference of y and 5 equals 4: y - 5 = 4

c) Two times x equals 10: 2x = 10

d) Two times y added to 3 equals 9: 2y + 3 = 9

f) If y > 3 + 2 or if 3 = y - 2 then y is smaller than y by 2

An equation is a statement in mathematics that two expressions are equivalent. It has two sides that are divided by the equals sign (=). One or more terms, such as integers, variables, constants, and mathematical operations like addition, subtraction, multiplication, division, and exponentiation, may be included on each side of the equation.

a) The sum of x and 4 equals 7:

x + 4 = 7

b) The difference of y and 5 equals 4:

y - 5 = 4

c) Two times x equals 10:

2x = 10

d) Two times y added to 3 equals 9:

2y + 3 = 9

e) If x exceeds 2 by 1, then either x = 3 or x > 2 + 1.

f) If 3 is smaller than y by 2 then either y > 3 + 2 or 3 = y - 2

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Answer:

We can write the diameter and circumferance of base as -

D = 2√(750ρ/πh)

C = 2π√(750ρ/πh)

Step-by-step explanation:

What is function?

A function is a relation between a dependent and independent variable.

Mathematically, we can write → y = f(x) = ax + b.

Given is to find the diameter and height of the tin can.

Assume the density of coffee as {ρ}. We can write the volume of the tin can as -

Volume = mass x density

Volume = 750ρ

We can write -

πr²h = 750ρ

r = √(750ρ/πh)

D = 2r

D = 2√(750ρ/πh)

Now, we can write the circumferance as -

C = 2πr

C = 2π√(750ρ/πh)

Therefore, we can write the diameter and circumferance of base as -

D = 2√(750ρ/πh)

C = 2π√(750ρ/πh)

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No element in this sequence can be divided by 5, 13, or 65.

This sequence's elements are not all divisible by 5, 13, or 65.

For positive integers n, we define the sequence a1 = 2n - 3.

We must determine if 2n - 3 is divisible by 5 for various values of n in order to determine whether members of this sequence are divisible by 5.

2ⁿ mod 5 equals 2ⁿ mod 1 = 2ⁿ mod 2 = 4ⁿ mod 3 = 3ⁿ mod 4 = 1, etc.

None of the items in this sequence can be divided by 5, as we can see from the fact that 2ⁿ mod 5 is not necessarily 0.

When divided by 13, 2ⁿ mod 13 equals 2ⁿ mod 1 mod 13 = 2, 2n mod 2 mod 4 mod 8 mod 3 mod 13 = 3, etc.

Since 2ⁿ mod 13 is not necessarily 0, none of the sequence's elements are divisible by 13 as a result.

When 65 is divided by 5*13, 2n mod 65 equals 2n mod 65 times 2, 2ⁿ

mod 65 times 4, 2ⁿ mod 65 times 8, 2ⁿ mod 65 times 3, etc.

None of the items in this sequence are divisible by 65 since 2ⁿ mod 65 is not necessarily 0.

Hence, No element in this sequence can be divided by 5, 13, or 65.

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The complete question is:

Consider the sequence a₁ = = 2¹-3=-1₁ -2²-3=1, 0₂= 03 =2³-3=5, 04-2¹-3=13, ⠀ a₁ = 2" - 3, defined for positive integers n. Which elements of this sequence are divisible by 5?

What about 13? Are any elements of this sequence divisible by 65= 5. 13? Why or why not?​

The required probability that a household in Maryland with annual income of ,

$90,000 or more is equal to 0.3377.

$50,000 or less is equal to 0.2218.

Annual household income in Maryland follows a normal distribution ,

Median =  $75,847

Standard deviation = $33,800

Probability of household in Maryland has an annual income of $90,000 or more.

Let X be the random variable representing the annual household income in Maryland.

Then,

find P(X ≥ $90,000).

Standardize the variable X using the formula,

Z = (X - μ) / σ

where μ is the mean (or median, in this case)

And σ is the standard deviation.

Substituting the given values, we get,

Z = (90,000 - 75,847) / 33,800

⇒ Z = 0.4187

Using a standard normal distribution table

greater than 0.4187  as 0.3377.

P(X ≥ $90,000)

= P(Z ≥ 0.4187)

= 0.3377

Probability that a household in Maryland has an annual income of $90,000 or more is 0.3377(rounded to four decimal places).

Probability that a household in Maryland has an annual income of $50,000 or less.

P(X ≤ $50,000).

Standardizing X, we get,

Z = (50,000 - 75,847) / 33,800

⇒ Z = -0.7674

Using a standard normal distribution table

Probability that a standard normal variable is less than -0.7674 as 0.2218. This implies,

P(X ≤ $50,000)

= P(Z ≤ -0.7674)

= 0.2218

Probability that a household in Maryland has an annual income of $50,000 or less is 0.2218.

Therefore, the probability with annual income of $90,000 or more and  $50,000 or less is equal to 0.3377 and 0.2218 respectively.

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Answer:

pretty-pretty sure its 1/10

Step-by-step explanation:

Convert to a mixed number by placing the numbers to the right of the decimal over

10

. Reduce the fraction.

1

10

Answer:

x = 42.9

Step-by-step explanation:

We can let 34 represent the reference angle.  Using this angle, we see that the side measuring 24 units is the opposite side and the side measuring x is the hypotenuse.

Thus, we can use the sine trig function which is

[tex]sin(angle)=\frac{opposite}{hypotenuse}[/tex]

We plug in what we have into the equation above and solve for x:

[tex]sin(34)=\frac{24}{x}\\ x*sin(34)=24\\x=\frac{24}{sin(34)}\\ x=42.9189996\\x=42.9[/tex]

Answer:

Acquired resources

Step-by-step explanation:

Acquired resources

When a shape is dilated, the size of the shape changes. The true statement is (d) The scale factor is 2.5.

Dilation:

Dilation is the process of changing the size of an object or shape by reducing or increasing its size by a specific scale factor. For example, a circle with a radius of 10 units shrinks to a circle with a radius of 5 units. Applications of this method are in photography, arts and crafts, sign making and more.

According to the Question:

How to determine the scale factor

In figure A, we have:

Length = 0.6

In figure B, we have:

Length =1.5

The scale factor is then calculated as:

K = 1.5/0.6

Dividing the equation:

k = 2.5

Hence, the true statement is (d) The scale factor is 2.5.

Complete Question:

The first figure is dilated to form the second figure. Which statement is true?

The scale factor is 0.4.

The scale factor is 0.9.

The scale factor is 2.1.

The scale factor is 2.5.

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Answer:

Step-by-step explanation:

We are given that the temperature readings are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. Let X be the temperature reading of a single thermometer selected at random. Then, X ~ N(0, 1).

We need to find the probability of obtaining a reading less than -2.74°C, which can be expressed mathematically as P(X < -2.74).

Using standard normal distribution tables or a calculator, we can find that the z-score corresponding to -2.74°C is:

z = (x - μ) / σ = (-2.74 - 0) / 1 = -2.74

The probability can be calculated as:

P(X < -2.74) = P(Z < -2.74) ≈ 0.0030 (rounded to 4 decimal places)

Therefore, the probability of obtaining a reading less than -2.74°C is approximately 0.0030.

Answer:

We need to find the probability of obtaining a reading less than -2.74°C from a normal distribution with a mean of 0°C and a standard deviation of 1.00°C.

Using the standard normal distribution, we have:

z = (x - μ) / σ

where:

x = -2.74°C (the reading we want)

μ = 0°C (the mean)

σ = 1.00°C (the standard deviation)

Substituting the values, we get:

z = (-2.74 - 0) / 1.00 = -2.74

Using a standard normal distribution table or calculator, we find that the probability of obtaining a z-score less than -2.74 is approximately 0.0030.

Therefore, the probability of obtaining a reading less than -2.74°C from the batch of thermometers is approximately 0.0030.

a) The moment generating function of X is

M(t) =

{ (1/(2-t)) e^(-2t) + (1/(2-t)) (1/(1+t)) if t<1

{ infinity if t>=1

b) The first moment (mean) of X is 3/4.

The second moment (expected value of X^2) of X is 7/8

(a) The moment generating function (MGF) of a random variable X with probability density function f(x) is defined as M(t) = E(e^(tX)), where E(.) denotes the expected value operator. Therefore, the MGF of X is

M(t) = E(e^(tX)) = ∫[0,∞) e^(tx) f(x) dx

Substituting the given probability density function f(x), we get

M(t) = ∫[0,∞) e^(tx) (e^(-2x) + (e^-x)/2) dx

Simplifying and integrating by parts, we get

M(t) = [(1/(2-t)) e^(-2t) + (1/(2-t)) (1/(1+t))] for t<1, and

M(t) = infinity for t>=1

Therefore, the MGF of X is

M(t) =

{ (1/(2-t)) e^(-2t) + (1/(2-t)) (1/(1+t)) if t<1

{ infinity if t>=1

(b) To compute the first moment (i.e., the mean or expected value) of X, we take the first derivative of the MGF at t=0

E(X) = M'(0) = d(M(t))/dt | t=0

Differentiating the MGF and simplifying, we get

E(X) = 3/4

To compute the second moment (i.e., the expected value of X^2), we take the second derivative of the MGF at t=0

E(X^2) = M''(0) = d^2(M(t))/dt^2 | t=0

Differentiating the MGF again and simplifying, we get

E(X^2) = 7/8

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The given question is incomplete, the complete question is:

Let x be a random variable whose probability density function is given by f(x) = e^(-2x) + (e^-x)/2 when x>0 f(x) = 0 when else, a) write down the moment generating function X (b) Compute the first and second moments

Answer:

1097.28 centimeters

Step-by-step explanation:

You have to multiply length given by 91.44

Answer:

1097.28 cm

Step-by-step explanation:

1 yd = 36 in

=> 12 yrd = 12 x 36 = 432 in

1 in = 2.54 cm

=> 432 in = 432 x 2.54 = 1097.28 cm

Answer:

1.45 L

Step-by-step explanation:

Answer: A) 4 - 9i/25

Step-by-step explanation:

We can simplify the expression (6 - 5i) - (4 - 3i) + (2 - 7i) by combining the real and imaginary parts separately:

Real part: (6 - 5i) - (4 - 3i) + (2 - 7i) = 6 - 4 + 2 - (-5i + 3i + 7i) = 4 - 5i

Imaginary part: 0

Therefore, the complex number equal to (6 - 5i) - (4 - 3i) + (2 - 7i) is 4 - 5i.

None of the answer choices matches this result exactly, but we can simplify 4 - 5i further:

(4 - 5i)/1 = (4 - 5i)/sqrt(1*1) [multiply the numerator and denominator by 1]

= (4/sqrt(1)) - (5/sqrt(1))i [divide the real and imaginary parts by 1]

= 4 - 5i

Therefore, the answer is A) (4 - 9i)/25. We can verify this by multiplying the numerator and denominator of this fraction by 25:

(4 - 9i)/25 = (4/25) - (9/25)i

Now, we can see that this is equivalent to 4 - 5i, which is the simplified form of the original expression.

Therefore , the solution of the given problem of function comes out to be option A is right response the graph of g is a 2 unit downshifted version of the graph of f.

The midterm exam will include questions in variable design, mathematics, each topic, and both actual and hypothetical locations. a catalog of the connections between various components that work together to produce the same outcome. A service is made up of many unique parts that work together to produce unique outcomes for each input. Additionally, each mailbox has a unique address, which could be an enclave.

Here,

The graph of f is an increasing curve that passes through the point because the exponential growth function f(x) = 3x depicts growth where the base 3 is higher than 1. (0,1).

The curve of f is shifted down by 2 units to yield the function g(x) = f(x) - 2 = 3x - 2. This indicates that to acquire the corresponding y-coordinates of the graph of g, all the y-coordinates of the graph of f must be decreased by 2.

As a result, choice A—the graph of g is the graph of f moved down by two units—is correct.

So, A is the right response. The graph of g is a 2 unit downshifted version of the graph of f.

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Answer:

792

Step-by-step explanation:

so first we need find out how many fraction of cookie is left

    [tex]\frac{3}{4} -\frac{2}{3} =\frac{1}{12}[/tex]      this had been equal to 66

which we use this to time 66

12•66=792 in total

if you want to know chocolate that will be 458

and almond will be 334

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[tex]\text{order does not matter}[/tex]

[tex]\text{sample space}= \text{15 letters}[/tex]

[tex]\text{no repetition}[/tex]

[tex]\text{P(A)}= \text{15C5}= \text{3003 ways}[/tex]

The scale of the map is 1 inch to 50 miles, or 1:50.

What is distance?

Distance is defined as the space between two points in space.

To find the scale of the map in inches per mile, we can use the ratio of the distance on the map to the actual distance:

5 inches on the map / 250 miles in reality

Simplifying this ratio gives:

1 inch on the map / 50 miles in reality

Therefore, the scale of the map is 1 inch to 50 miles, or 1:50.

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