which expression is not equavilent

Answer:

  none of the above

  (1 -4n +3n^2)(-1)^n

Step-by-step explanation:

You have the recursive relation {a[0]=1, a[1]=0, a[2]=5, a[n]=-3a[n-1] -3a[n-2] -a[n-3]} and you want to know the explicit relation.

The given initial value a[0] = 1 rules out choice A.

The value a[1] = 0 rules out choices B and C.

We observe that changing the sign of the constant in the first choice will make it match the sequence:

  (1 -4n +3n^2)(-1)^n . . . . . . the solution for the recursive equation

Answer: It is crucial for students to look for and make use of a structure because this practice requires them to reason about the underlying mathematical structure and unity of mathematics ideas.

The area and the circumference of the circular plate is 452.16 in² and  75.36 in

What is area and circumference of circular plate?

Area of circular plate , A = πr²

=3.14 * 12 * 12

= 452.16 in²

Circumference of the circular plate, C = π * 2r

= 3.14 * 2 * 12                
= 75.36 in

Hence, the area and the circumference of the circular plate is 452.16 in² and  75.36 inches.

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Answer:

--------------------------

Convert this to vertex form by completing the square.

Recall identity (a ± b)² = a² ± 2ab + b² and apply as given below:

Answer:

[tex](x-3)^2-11[/tex]

Step-by-step explanation:

Given quadratic expression:

[tex]x^2-6x-2[/tex]

To write the given expression in the form (x + a)² + b, complete the square.

Add and subtract the square of half the coefficient of the term in x:

[tex]\implies x^2-6x+\left(\dfrac{-6}{2}\right)^2-2-\left(\dfrac{-6}{2}\right)^2[/tex]

Simplify:

[tex]\implies x^2-6x+\left(-3\right)^2-2-\left(-3\right)^2[/tex]

[tex]\implies x^2-6x+9-2-9[/tex]

The first three terms x² - 6x + 9 form a perfect square trinomial.

A perfect square trinomial can be written as the square of a binomial.

Factor the perfect square trinomial:

[tex]\implies(x-3)^2-2-9[/tex]

Simplify:

[tex]\implies(x-3)^2-11[/tex]

Therefore, the given expression written in the form (x + a)² + b is:

[tex]\boxed{(x-3)^2-11}[/tex]

Answer: 3702

Step-by-step explanation: from plato

By the Definition of a Correlation Coefficient,

x and y do not have a linear relationship.

Option B is the correct answer.

The correlation coefficient describes the movement of one variable in relation to another. A positive correlation indicates that the two are moving in the same direction, with 1 denoting a perfect positive correlation. A value of -1 indicates a perfect negative, or inverse, correlation, while a value of zero indicates that no linear correlation exists.

The number's value indicates the strength of the relationship: r = 0 indicates that there is no correlation. r = 1 indicates that there is a perfect positive correlation. r = -1 shows a perfect negative correlation.

According to the question, If the correlation coefficient is zero, there is no linear relationship.

If the correlation coefficient is zero, the relationship between x and y is not linear. Another possible relationship (such as an exponential or quadratic) could exist, but this is dependent on the scatter plot provided.

By the Definition of a Correlation Coefficient,

Option B is the correct answer.

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By the Definition of a Correlation Coefficient, X and Y do not have a linear relationship. Option B is the correct answer.

The correlation coefficient describes the movement of one variable in relation to another. A positive correlation indicates that the two are moving in the same direction, with 1 denoting a perfect positive correlation. A value of -1 indicates a perfect negative, or inverse, correlation, while a value of zero indicates that no linear correlation exists.

The number's value indicates the strength of the relationship: r = 0 indicates that there is no correlation. r = 1 indicates that there is a perfect positive correlation. r = -1 shows a perfect negative correlation.

According to the question, If the correlation coefficient is zero, there is no linear relationship.

If the correlation coefficient is zero, the relationship between x and y is not linear. Another possible relationship (such as an exponential or quadratic) could exist, but this is dependent on the scatter plot provided.

By the Definition of a Correlation Coefficient,

Option B is the correct answer.

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Slope of line is 1/2.

What is slope?

In arithmetic, the slope or gradient of a line is a range that describes each the direction and therefore the gradient of the road.

Main body:

to find the slope from a graph , we need to fix two co-ordinates at slope for axis

let point at x be = (40,40)

let point y = (80,60)

Formula for slope ,

m = y₂-y₁/x₂-x₁

m = 60-40/80-40

m = 20/40

m = 1/2

hence , slope of line is 1/2.

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The maximum loan you can obtain if the rate for a 25-year mortgage is 8.65% is $298,853.76

A monthly payment can be calculated as;

Monthly payment = (Monthly income - payment)(percentage payment)

38% of your gross monthly income is

 0.38 × $6,500 = $2470

If you're already spending $525 on monthly payments, the amount the bank says you can afford for a mortgage loan;

Then

$2470-525= $1945

The amortization formula can be used to find the corresponding loan value.

A = P(r/25)/(1 -(1 +r/25)^(-25t))

where A is the monthly payment on a loan of P at interest rate of r for time t years.

Filling in the known values, we have ;

 1945= P(.0525/25)/(1 -(1 +.0525/25)^(-12·30))

≈ 0.00515636808·P

Then the maximum loan can obtain is

 P = $1945/0.00515636

P ≈ $298,853.76

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Answer:

I think that's 11,8

Step-by-step explanation:

Hope its right

The required length of each panel would be 1 feet.

Given that,
A mural is 7  feet long and is divided into 7 equal-length panels. How many feet long is each panel to be determined.

The process in mathematics to operate and interpret the function to make the function or expression simple or more understandable is called simplifying and the process is called simplification.

here,
The required length of each panel = total length of the panel / 7
                                                     = 7 / 7 = 1 feet

Thus, the required length of each panel would be 1 feet.

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The margin of error for 16 eggs with sample means 2 ounce and standard deviation as 42 ounces is   18.407   .

In the question ,

it is given that ,

the number of eggs = 16

the sample means weight is = 2 ounce .

the standard deviation is = 42 ounces .

we have to find the margin of error .

degree of freedom is 16 - 1 = 15 .

and the t score for the 90% confidence interval is

t₁₅,₀.₀₅ = 1.753

So , the margin of error is =  t₁₅,₀.₀₅×(standard deviation/√n)

Substituting the values ,

we get ,

= 1.753×(42/√16)

On simplifying further ,

we get ,

= 18.407

Therefore , the margin of error is = 18.407 .

The given question is incomplete , the complete question is

A sample of 16 eggs yields a sample mean weight of 2.00 ounces and a sample standard deviation = 42.0 ounces, find the margin of error in estimating a confidence interval estimate at the 90% level of confidence. Round your answer to three decimal places. You may assume that egg weights are normally distributed .

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By using the concept of discount, it can be calculated that

The bike should be marked at $440

What is discount?

Sometimes during sale, the items are sold at a reduced price from the original price of the item. The difference between the reduced price and the original price of the item is called discount.

Price paid by John for a new mountain bike = $280

Markup price = [tex]\frac{10}{100} \times 280[/tex] = $28

Price after markup = $(280 + 28) - $308

Let the marked price be $x

Rate of discount = 30%

Discount = [tex]\frac{30}{100}\times x[/tex]

Price after discount = [tex]x - \frac{30}{100}\times x[/tex]

                                 = [tex]\frac{100x - 30x}{100}[/tex]

                                 = [tex]\frac{70}{100}x[/tex]

By the problem,

[tex]\frac{70}{100}x = 308\\x = \frac{308 \times 100}{70}\\[/tex]

x = $440

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Based on the given parameters, the car would be $497.9 expensive in 9 years

The given parameters about the compound interest are

Compound interests are different from simple interest, and they are calculated using the following compound interest formula

CI = P(1 + R)^t - P

To calculate the amount, we have:

A = P + CI

So, the equation becomes

A = P + P(1 + R)^t - P

Evaluate the like terms

A = P(1 + R)^t

In this case, we introduce the variable n

So, we have

A = P(1 + R/n)^nt

Where n is the number of times in a year

i.e. n = 12

Substitute the known values in the above equation

A = 325 * (1 + 4.75%/12)^(12 * 9)

Evaluate the percentages and the quotients

A = 325 * (1 + 0.0039583)^(108)

Evaluate the sum

A = 325 * (1 .0039583)^(108)

Evaluate the exponent

A = 325 * 1.532

Evaluate the product

A = 497.9

Hence, the value of the investment after 9 years is $497.9

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Answer:

Step-by-step explanation:

Clearly, it can be seen that 10/12 represents the largest fraction. Hence 5/6 (which is equivalent to 10/12) is larger than 2/3 or 3/4.

Answer: no they are equal either simplified to 5/6 or decimal 0.83 repeating decimal.

Step-by-step explanation:

So the RHS of the given equation is incorrect.

Answer:

-----------------------------------------

Given:

Find a function g which is a horizontal shrink by a factor of 1/3 of f(x).

Horizontal shrink by a factor of k is:

Apply this to the given function:

The compound interest is 61.342 years.

What is compound interest?

Compound interest is the interest calculated on the principal and the interest accumulated over the previous period. It is different from simple interest, where interest is not added to the principal while calculating the interest during the next period.

To find the time period the interest must be compounded quarterly.

Calculated twelve times a year is interest that is compounded monthly. Interest is calculated on a quarterly compound basis, four times a year.

Given that;

               A = 1700                         P = 500

                 r = 2%                          n = 4

                   = 2/100

                 r = 0.02 /year

 Using the formula  A=P(1+r/n)ⁿt  find the time period (t)

t = ln(A/P) / n[ln(1 + r/n)]

t = ln(1,700.00/500.00) / ( 4 × [ln(1 + 0.02/4)] )

t = ln(1,700.00/500.00) / ( 4 × [ln(1 + 0.005)] )

t = 61.342 years

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The absolute maximum is 1.29, which occurs at x= 9

What is absolute extrema?

An absolute extremum  of a perform in an exceedingly given interval is that the purpose at that a most or minimum worth of the perform is obtained. Frequently, the interval given is that the function's domain, and therefore the absolute extremum is that the purpose admire the most or minimum worth of the complete perform.

Main body:

Given =

f(x) = [tex](x^{2} -64)^{1/11[/tex]

f' (x) = derivative of function f(x)

f'(x) = 1/11[tex](x^{2} -64)^{-10/11[/tex] . 2x

     = [tex]2 \frac{x}{11}[/tex][tex](x^{2} -64)^{-10/11[/tex]

putting f'(x) = 0

2x/11 [tex](x^{2} -64)^{-10/11[/tex] = 0

         [tex](x^{2} -64)^{-10/11[/tex] = 0

                     [tex]x^{2} -64[/tex] = 0

 x² = 64

x = ±8

We are given interval [-8,9].

Hence, calculating f(x) at -8, 8, 9.

f(-8) =  0

f(8) = 0

f(9) = [tex]17^{1/11}[/tex]

      = 1.29

Hence, absolute maximum value is 1.29 at x=9.

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Answer: 15, not including the frisbees. (The answer would be 20 if the frisbees were in there)

Step-by-step explanation: 25% is equivalent to 1/4, and 5 is equal to 1/4. The simplest way to solve this is to multiply 5 by 4, and you'll get 20. Then subtract 5 (the frisbees) and you'll get 15. (Sorry if that doesn't make much sense haha) Hope this helps!!

The required proportional relationship is given as y = 4x and shown in the graph.

proportionality is defined as between two or more sets of values, and how these values are related to each other in the sense are they directly proportional or inversely proportional to each other.

here,
According to the question,
The proportional relationship gives the number of liters of water the facet supplies, y, after x minutes,
y = kx - - - - - (1)
Put x = 3 so y = 4
12 = k[3]
k = 4

From equation 1,
y = 4x

Thus, the required proportional relationship is given as y = 4x and shown in the graph.

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The value of AB is 6 units.

What are Similar Rectangles ?

Similar rectangles states that the corresponding sides are in proportion.Two rectangles are similar when the corresponding adjacent sides have the same ratio. We do not need to check the angles as all angles in a rectangle are 90 degrees.

As per the statement:

Rectangle ABCD is similar to rectangle WXYZ.

WX = 8 feet, AD = 12 feet and WZ = 16 feet.

Since. Rectangle ABCD and rectangle WXYZ are similar

then;

their corresponding sides are in proportion:

[tex]\frac{AB}{WX} =\frac{BC}{XY} = \frac{CD}{YZ} =\frac{AD}{ZW}[/tex]

To find the value of AB:

[tex]\frac{AB}{WX} =\frac{AD}{ZW}[/tex]

Substitute the given values we have;

[tex]\frac{AB}{8} =\frac{12}{16}[/tex]

Multiply both sides by 8 we have;

[tex]AB = \frac{12}{16} * 8 = 6[/tex]

Therefore, the value of AB is 6 units.

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Answer: x = 36;  y = 36

Step-by-step explanation:

This is an isosceles triangle, so the 2 "bottom" angles are equal:

2x = 72

x = 72/2 = 36

sum of interior angles = 180

180 - 72 - 72 = 36

A hypothesis is an assumption, an idea that is proposed for the sake of argument so that it can be tested to see if it might be true.

a. two-tailed test

b. reject H0 if Z>1.96 or Z<-1.96

c. Z = 1.73

d. we have failed to reject the null hypothesis

e. P-value = 0.0418

We need to find our critical value:

Zα/2 = Z(0.05/2) = 0.025

The Z test will be done using the next equation:

Z = (x⁻1 - x⁻2) - (μ1 - μ2) / √( σ²1/n1 + σ²2/n2

Z = (100.5 - 98.8) - (0) / √( (3.4)²/38 + (5.8)²/51 = 1.7/0.9817 = 1.73

Z<1.96, therefore we have failed to reject the null hypothesis

The P-value for this test would be represented by the probability of Z being greater than 1.73, so we can look for it in any Z table, finding that its value is 0.0418, and because P-value>0.025 we again confirm that we don't have evidence statistically significant to reject the null hypothesis

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The probability of rolling an odd number or a number less than 4 is 2/3.

What is probability?

The degree to which something is likely; the probability that something will occur or will be the case.

Here, we have

Given

A single die is rolled.

Sample space = {1, 2, 3, 4, 5, 6}

Let P(A) be the probability of getting an odd number, where A = {1, 3, 5}

Let P(B) be the probability of getting a number less than 4,

where B = {1,2,3}

A ⋂ B ={1, 3}

P(A) = 3/6 = 1/2

P(B) = 3/6 = 1/2

P(A ⋂ B) = 2/6 = 1/3

Let P be the required probability of getting an odd number or a number less than 4

P = P( A ⋃ B ) = P(A) + P(B) - P(A ⋂ B)

P( A ⋃ B ) = 1/2 + 1/2 - 1/3

P( A ⋃ B ) = 1 - 1/3

P( A ⋃ B ) = 2/3

Hence, the probability of rolling an odd number or a number less than 4 is 2/3.

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Answer:

106

Step-by-step explanation:

The pattern goes +6, +12, +18, etc

Thus, the final term is simply +30.

76+30 = 106

Hope it helps :) and let me know if you want me to elaborate.

The number of employees with petrol cars is 423

In exponential decay, a quantity initially drops gradually before decreasing quickly. Finding the exponential drop of a fast reduction over time is made easier by the exponential decay formula.

The exponentially decreasing formula is used to calculate the radioactivity decay, population decay, and half-life.

The formula for Exponential Decay is given by

Here we have

In 2010, a total of 2187 of the employees at Zoe's company owned a petrol car.

In 2013, there were 1029 employees with petrol cars.  

The number of cars decreases exponentially,  

As we know the formula for Exponential Decay, A = P (1 - r)^t

From the given data,  a = 2187 and t = 3

The number of cars decreased = 2187 (1 - r)³

=> 2187 (1 - r)³ = 1029  

=> (1 - r)³ = 1029/2187

=> (1 - r)³ = 343/729  

=> (1 - r)³ = 7³/ 9³

=> 1 - r = 7/9

=> r = 1 - 7/9

=> r = 2/9

=> r = 0.2222

The Number of cars in 2017 i.e after 4 years from 2013

=> (1029)(1 - 0.2222)⁴

=> 423.0721516 ≅ 423          

Therefore,

The number of employees with petrol cars is 423

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The required length of the building is given as 32 cm.

The scale factor is defined as the ratio of the modified change in length to the original length.

Here,
The height of the building is 250 meters, the length of the building is 160m, and on the drawing, the height of the building is 50 cm,
Scale factor = height on drawing / original height
Scale factor = 50 / 250
Scale factor = 1/5

Now,
Length in drawing = scale factor × original length,
length in drawing = 1 / 5 × 160
                           = 31

Thus, the length of the building as of the scale factor 1/5 is given as 31 cm.

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Answer:

x=18

36/2=18

all good.

Answer:

450 g = 6 people

? kg = 18 people

450 x 18 = 8100

8100 = 6x

8100/6 = 6x/6

x = 3150 kg of rice is needed for 18 people.