What is this question? I REALLY NEED HELP!!!

Answer: 12

Step-by-step explanation: 21-1-1-1-1-1-1-1-1-1-1-1-1-1-1-1=12

Answer:

Just look at the explanation

Step-by-step explanation:

So, since Mr.Nicholson is getting an increase of 3500 per year, that is arithmetic sequence. Also, there would be a difference of 3500 in his annula raise each year.

The 5% raise is geometric sequence, b/c there is a constant increase (or ratio) of .05 ( or 5 percent) in each annual salary.

Hope this helps!

Answer:

w = 9/8

Step-by-step explanation:

Step 1: Add 1/2 to each side of the equation.

Step-2: Quickly step to one side, to avoid being injured as the answer jumps up at you from the paper.

If the ratio of the number of students and adults in the book fair is 4:3, the new ratio when 169 students left the fair is 4:5, then the number of adults in the book fair is 318

Let the number of students be 4x

Let the number of adults be 3x

When 169 students left the fair, number of students left = 4x - 169

According to question,

(4x-169)/3x = 4/5

⇒ 5(4x-169) = 4×3x

⇒ 20x - 845 = 12x

⇒ 20x - 12x = 845

⇒ 8x = 845

⇒ x = 845/8

⇒ x = 105.625

⇒ x = 106

Number of adults = 3x = 3×106 = 318

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By using the formula for mean and variance, it can be calculated that

Mean of X = 25

Variance of X = 51.67

What is mean and variance?

Suppose there is a data set. Mean gives the average of the values of the data set

Variance is the square of the sum of deviation from mean.

Let x be the total; of the numbers on the two card

Possible values of X= 15, 20, 25, 30, 35

P(X = 15) = \(\frac{2}{12}\)

P(X = 20) = \(\frac{2}{12}\)

P(X = 25) = \(\frac{4}{12}\)

P(X= 30) = \(\frac{2}{12}\)

P(X = 35) = \(\frac{2}{12}\)

Mean of X =

\(15 \times \frac{2}{12} + 20 \times \frac{2}{12} +25 \times \frac{4}{12} + 30 \times \frac{2}{12} + 35 \times \frac{2}{12}\\\\\frac{300}{12}\\\\25\)

Variance of X =

= \((225 \times \frac{2}{12} + 400 \times \frac{2}{12}+625 \times \frac{4}{12}+900 \times \frac{2}{12}+1225 \times \frac{2}{12}) - (25)^2\\\\\frac{8000}{12} - 625}\\\\666.67 - 625\\\\51.67\)

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Complete Question

In a box are four cards numbered 5, 10, 15, 20. two cards are taken out at random without replacement, and X is the total; of the numbers on the two card. Find the mean and variance of X .

The approximate number of text messages sent in 2011 is 2 x 10^1.

Scientific notation is used in expressing large numbers in smaller numbers. To write a number in scientific notation, the number is written as a decimal number, between 1 and 10 and multiplied by a power of 10.

118, 000, 000, 000 in scientific notation is 1,18 x 10^11

2,357, 000, 000, 000 in scientific notation is 2.357 x 10^12

Difference in messages sent in 2011 compared to 2005 : (2.357 / 1.18) x 10^(12 - 11)

2 x 10^1

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Answer:

\(SA = 2.94 \, \textrm{units}^2\)

Step-by-step explanation:

The surface area of a regular 3D figure can be represented as:

\(SA = A_{\textrm{\,1 side}} \cdot (\# \textrm{ of sides})\).

Therefore, the surface area of a cube is:

\(SA = s^2 \cdot 6\)

where \(s\) is the length of a side.

To solve this problem, simply input the given side length into the above formula:

\(SA = 0.7^2 \cdot 6\)

and simplify.

\(SA = 0.49 \cdot 6\)

\(SA = 2.94 \, \textrm{units}^2\)

Answer:

The rate of customers entering the store would be 3 minutes per customer.

Step-by-step explanation:

3 customers entered over the course of 9 minutes

We can simplify 3/9 to 1/3. That would mean 1 customer enters every 3 minutes.

Answer:

x² -x + 1

Step-by-step explanation:

(x^4 + x^3 + 7x^2 - 6x + 8) / x^2 + 2x + 8 =

x²+ 2x+8 )) x⁴+ x³+7x² -6x+8= x²-x+1

x⁴+ 2x³+8x²

_________-

-x³ - x² - 6x

-x³ -2x² - 8x

__________-

x² + 2x + 8

x² + 2x + 8

__________-

0

Answer: 12

Step-by-step explanation: You're welcomed

The quotient of the decimal numbers 57.15 and 4.5 is 12.7.

The given decimal numbers are 57.15 and 4.5.

In arithmetic, a quotient is a quantity produced by the division of two numbers. The quotient has widespread use throughout mathematics, and is commonly referred to as the integer part of a division, or as a fraction or a ratio.

Here, 57.15/4.5

4.5|57.15|12.7

     57.15
  _______
       0

Therefore, the quotient of the decimal numbers 57.15 and 4.5 is 12.7.

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The value of "m' that makes the expression equivalent is 0.2584

Given the expression 12 (–1.4m + 0.4) = m + 0.2

We need to solve for the value of m from the expression.

Expand using the distributive law:

12(-1.4m) + 12(0.4) = m +  0.2

16.8m + 4.8 = m + 0.2

Collect the like terms:

-16.8m - m = 0.2 - 4.8

-17.8m = -4.6

m = 4.6/17.8

m = 0.2584

Hence the value of "m' that makes the expression equivalent is 0.2584

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Answer:

The area is π= 3.14 approx

Hope it helps!

Step-by-step explanation:

Area of circle = πr^2

Radius= r = 1 unit

So area,

= 3.14*(r)^2

= 3.14*(1)^2

= 3.14*1

= 3.14 or π if you want the specific answer

Answer:

Area of circle = πr^r

Area = 22/7*(1)^2

Area= 22/7 or 3.14 unit

Answer:

6.02

Step-by-step explanation:

its really simple.

   4 . 3 2

+  1  . 7

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

  6  . 0 2

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

Putting the values of x and y in equation

\( \rm \large \purple\implies \: \:{6x}^{5} \: - \: 3y \: + \: 7 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \rm \large \purple\implies \: \: 6 { (-2)}^{5} \: - \: 3( - 1) \: + \: 7 \\ \\ \rm \large \purple\implies \: \:6( - 32) \: + \: 3 \: + \: 7 \: \: \: \: \: \: \: \: \\ \\ \rm \large \purple\implies \: \: - 192 \: + \: 10 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \\ \rm \large \purple\implies \: \: - 182 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \)

If x = -2 and y = -1 then 6x⁵ - 3y + 7 = -182

x = -2

y = -1

Solve

6x⁵ - 3y + 7

Let's use substitution method,

Substitution simply means to put in place of another.

Therefore, let's substitute the values of x and y in the equation.

6x⁵ - 3y + 7

6(-2)⁵ - 3(-1) + 7 = 6(-32) + 3 + 7 = -192 + 10 = -182

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Step-by-step explanation:

Ratio of adults to children= 7:3

Total no. Of people at the cricket match:150

To find the value of the ratios, 7x+3x=150 ; 10x=150 ; x=150/10:15

So, 7:3 is 7(15) adults to 3(15) children,

Total no. Of adults: 105

Total no. Of children: 45

So, as per the question, the no. Of children that attended the cricket match is 45

The location of √ 7 on a number line between 2 and 3.

A number line is a picture of a graduated straight line that serves as a visual representation of real numbers in primary mathematics. Every number line point is considered to correspond to a real number and every real number to a number line point.

A number line is a long straight line with numbers marked at equal intervals. On a number line, we can argue that as we move to the right, the value of numbers increases. This signifies that the numbers on the right are more than those on the left.

A number line shows how numbers are related. It's a line with check marks next to each number. The numerals get smaller as you move left on the number line. The numbers grow larger as you move closer to the number line.

In this case, ✓7 is 2.65. This number can be found between 2 and 3. This should be the true statement since the options aren't given.

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Answer:5.2 x 10-1

Step-by-step explanation:hope i could help ;)

h(4) is 2(4)+3 which is 11

therefore g(11) is -4(11) = -44

is this a different language-

Answer:

i hope u can round other wise its this 4   3649237 / 10000000

Step-by-step explanation:

the dash is the fraction symbol

The rocket's average speed for the 8 hours was 2000 miles per hour the average speed accounts for the overall distance covered in the given time period.

To calculate the average speed, we divide the total distance traveled by the total time taken. In this case, the rocket traveled 12000 miles in the first four hours and 8000 miles in the next four hours, resulting in a total distance of 20000 miles. The total time taken is 8 hours. Dividing the total distance by the total time gives us the average speed, which is 20000 miles divided by 8 hours, equaling 2500 miles per hour.

However, it's important to note that average speed is calculated by dividing the total distance by the total time, regardless of the variations in speed throughout the journey. In this case, the rocket traveled at different speeds during the first four hours and the next four hours, but the average speed accounts for the overall distance covered in the given time period.

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In the given case the set of 56 students who returned surveys is an example of a sample

A sample would be the 56 students who responded to the surveys. A sample is a portion of the population that is chosen for a study in research. American college students would be the population in this scenario. The 56 students who returned the surveys were chosen at random for the sample by the researcher.

The researcher is attempting to guarantee that the sample is representative of the greater population of American college students by utilising a random selection process. The researcher discovered that these students spend an average of 4.1 hours per week working on course material outside of class based on the data collected from the sample. This is an example of a descriptive statistic that provides a summary of the information gleaned from the sample.

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Answer:

The customer will pay $19

Option B is correct.

Step-by-step explanation:

Price of Ham per pound = $5.99

Price of Turkey per pound = $4.99

Price of Roast beef per pound = $6.99

Price of Salami per pound = $2.99

Price of Bologna per pound = $3.99

Customer purchased:

Ham = \(\frac{1}{4}\) pound

Turkey = \(1\frac{1}{2}=\frac{3}{2}\) pound

Roast beef = 1 pound

Bologna = \(\frac{3}{4}\) pound

We will multiply the pound purchased with per pound price and add them to find the total cost.

The customer will pay :

\(\frac{1}{4}\times5.99+\frac{3}{2} \times4.99+1\times6.99+\frac{3}{4}\times3.99\)

\(=1.4975+7.485+6.99+2.9925\\=18.965\\\approx19\)

So, the customer will pay $19

Option B is correct.

The expression is 5 * n².

An expression is a mathematical statement that consists of variables, constants and mathematical operators.

The representation of a quantity in terms of a value is done by a number.

There are various types of numbers like real numbers, natural numbers, whole numbers, rational numbers, etc.

The expression is :

Five times the square of a number

Let the number be n, then

5 * n²

Let n =1

The value of the expression will be

5 * (1)² = 5

Let n = 2

The value of the expression will be

5 * (2)²

5 * 4

20

Let n = 5

5 * (5)²

5 * 25

125

Let n = 100

5 * (100)²

5 * 10000

50000

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The polar form for a given complex number is 3√2(cos 7π/4 + i sin 7π/4)

Complex numbers are the numbers that are expressed in the form of a+ib where, a, and b are real numbers and 'i' is an imaginary number called “iota”. The value of i = (√-1).

Given that 3 – i3

For a complex number a+ bi, the polar form is given by

r(cos θ + sin θ), where r = √(a^2+b^2 ) and θ = tan^(-1)⁡〖b/a〗

Now 3 – i3

We have a =3 and b= -3

⇒ r = √(3^2+〖(-3)〗^2 )

⇒ r = √(9+9)

r = √18 = 3√2

Now θ = tan^(-1)⁡〖b/a〗

⇒ θ = tan^(-1)⁡〖(-3)/3〗

⇒ θ = 〖tan^(-1) (〗⁡〖-1〗)

⇒ θ = 2π-π/4

θ = 7π/4

Therefore the polar form of 3 – i3 = 3√2(cos 7π/4 + i sin 7π/4)

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A formula for the derivative of (x + 1) for any integer m can be expressed as y' = m(x+1)^(m-1).

Given expression is y = (x² + 1)²

Step 1: Finding y'
To find the derivative of y, we will use the chain rule.

y = u^2, where u = x²+1
Therefore, y' = 2u(u'), where u' is the derivative of u.

Applying the chain rule again, we get u' = 2x.
Hence, y' = 2(x²+1)(2x) = 4x(x²+1)

Step 2: Finding y"
To find the second derivative of y, we will again use the chain rule.

y' = 4x(x²+1)
Differentiating both sides with respect to x, we get
y" = (4x)'(x²+1) + 4x(2x)

y" = 4(x²+1) + 8x²

y" = 12x²+4

Step 3: Finding y'''
To find the third derivative of y, we will again use the chain rule.

y" = 12x²+4
Differentiating both sides with respect to x, we get
y''' = (12x²+4)' = 24x

Step 4: Derivative of (x+1)
Using the power rule of differentiation, the derivative of (x+1) to the power of m can be expressed as:

y' = m(x+1)^(m-1)

This formula can be used for any integer value of m.

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One possible three-dimensional figure that fits this description is a rectangular prism. Another possible option is a cylinder. A third option is a pyramid with a square base.

Based on your question, the three-dimensional figure could be one of the following three options:

1. Cone: If two cross sections are taken parallel to the base, they will both be circles but with different radii, making them similar but not congruent.

2. Pyramid: If two cross sections are taken parallel to the base, they will both be the same shape as the base (e.g., triangles, squares) but with different side lengths, making them similar but not congruent.

3. Frustum: A frustum is a section of a cone or pyramid with the top cut off parallel to the base. The two cross sections taken parallel to the base would be the same shape but with different dimensions, making them similar but not congruent.

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The rejection-region for null-hypothesis H₀: μ = 10, with significance-level of α = 0.01 and sample-size of n = 15, is t < -2.977 or t > 2.977.

To determine the rejection-region for the null-hypothesis H₀: μ = 10 and the alternative-hypothesis Hₐ: μ ≠ 10, with a significance-level of α = 0.01 and a sample-size of n = 15, we use t-distribution,

Step 1: Determine the degrees of freedom:

Degrees of freedom (df) = n - 1 = 15 - 1 = 14

Step 2: Find the critical t-values:

Since the alternative-hypothesis is two-sided (μ ≠ 10), we need to find the critical t-values that correspond to the tails of the t-distribution with a significance level of α/2 = 0.01/2 = 0.005,

We know that the critical "t-values" for α/2 = 0.005 and df = 14 are approximately -2.977 and 2.977,

Step 3: Determine the rejection-region,

The rejection region consists of the values of the test-statistic (t) that fall outside the critical t-values. In this case, the rejection region is t < -2.977 or t > 2.977.

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The given question is incomplete, the complete question is

A random sample of n observations in selected from a normal population to beat the null hypothesis that μ = 10. Specify the rejection region for Hₐ : μ ≠ 10, α = 0.01, n = 15.

Make's absolutely no sense. Please rephrase this as a question.