To number the pages of a book, 2022 digits are used. How many pages are in the book?

The values of a and b if they are integers are -10 and 3

Surd functions are square root of prime numbers. Given the following equation;

10 - √18 = a +b√2

Equate the real and surd part to form the equation

b√2 = √18

2b² = 18

b² = 9

b = 3

Similarly

a = -10

Hence the values of a and b if they are integers are -10 and 3

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Answer:(4,7/2)

Step-by-step explanation:

The conclusion will be; Since the P-value is less than α = 0.05, reject the null hypothesis. There is enough evidence to support the claim that there is a difference in the weights of running shoes. Option B.

Parameters

Group 1

n1=10

x=18.47

[tex]s^2_1[/tex]=2.12

Group 1

n2=15

x2=10.01

[tex]s^2_2[/tex]=0.62

Generally, the equation for the hypothesis is mathematically given as

[tex]H_0=\mu_1 =\mu=2 \\\\H_a= \mu_1 \neq \mu=2[/tex]

Therefore

[tex]t=\frac{12.47-10.01}{\sqrt{\frac{2.12}{10}+\frac{0.61}{15}}}[/tex]

t=4.8966

In conclusion, The pvalue from table is

p-value (4.8966, [tex]\alpha[/tex] =0.06)

[tex]p-value < \alpha=0.05[/tex]

since [tex]p-value < \alpha=0.05[/tex] we reject the null hypothesis and state that there is no difference b/w the two means.

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Answer:

[tex]-5x-5[/tex]

Step-by-step explanation:

original functions:

[tex]f(x)=3x-8\\g(x)=8x-3[/tex]

Subtract the polynomials:

[tex]f(x)-g(x) = (3x-8) - (8x-3)[/tex]

Distribute the negative sign:

[tex]3x-8-8x+3[/tex]

Combine like terms:

[tex](3x-8x)+(-8+3)[/tex]

Add like terms:

[tex]-5x-5[/tex]

Hello

42. ?

100 17

We use cross product.

[tex] \frac{42 \times 17}{100} = 7.14[/tex]

42% of 17 => 7.14

Have a nice day ;)

[tex]\huge\text{Hey there!}[/tex]

[tex]\huge\textbf{Question reads....}[/tex]

[tex]\large\textbf{What is 42\% of 17?}[/tex]

[tex]\huge\textbf{Answering your question}[/tex]

[tex]\mathbf{42\% \ of \ 17}[/tex]

[tex]\huge\textbf{Translating it to easier to terms}[/tex]

[tex]\mathbf{42\% \ of \ 17}[/tex]

[tex]\mathbf{= 42\%\times 17}\\[/tex]

[tex]\mathbf{= \dfrac{42}{100}\times 17}[/tex]

[tex]\mathbf{= \dfrac{42\div2}{100\div2}\times17}[/tex]

[tex]\mathbf{= \dfrac{21}{50}\times17}[/tex]

[tex]\mathbf{= \dfrac{21}{50} \times \dfrac{17}{1}}[/tex]

[tex]\mathbf{= \dfrac{21\times17}{50\times1}}[/tex]

[tex]\mathbf{= \dfrac{357}{50}}[/tex]

[tex]\mathbf{= 357 \div 17}[/tex]

[tex]\mathbf{= 7.14}[/tex]

[tex]\huge\textbf{Answer }\bf \huge\boxed{\downarrow}[/tex]

[tex]\huge\text{Therefore, your answer should be: \boxed{\mathsf{7.14}}}\huge\checkmark[/tex]

[tex]\huge\text{Good luck on your assignment \& enjoy your day!}[/tex]

~[tex]\frak{Amphitrite1040:)}[/tex]

Zeros, solutions, roots, x-intercepts, and factors are subjects that reference the same area on a polynomial graph.

A polynomial graph can be defined as a type of graph that can be used to represent only positive (non-negative) integer exponents of a variable in an equation.

This ultimately implies that, a polynomial graph touches the x-axis at zeros, solutions, roots, x-intercepts, and factors with even multiplicities.

In conclusion, we can logically deduce that zeros, solutions, roots, x-intercepts, and factors are subjects that reference the same area on a polynomial graph.

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Answer:

All real numbers

Step-by-step explanation:

there arent any domain restrictions

Answer: 196m squared

Step-by-step explanation: A square has equal sides, so if one side were to be equal to 14m, the other would too. 14 x 14 = 196.

The number of months that it will take the latest model's battery life to reach 1,008.9 minutes is; 8 months

Each month, there is an increase by a factor of 0.06 of the previous months model.

From geometric sequence formula of aₙ = ar^(n - 1),

where;

a is first term

r is common ratio

aₙ is nth term

we have;

1,008.9 = 671 * 1.06^(n - 1)

1008.9/671 = 1.06^(n - 1)

In 1.504 = (n - 1) In 1.06

0.408 = (n - 1) * 0.058

n - 1 = 0.408/0.058

n = 7.03 + 1

n ≈ 8 months

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The total amount of interest Dominick will pay throughout the life of the loan is $1350

Simple Interest is the interest applied only on the Principal amount invested or borrowed .

It is calculated by the formula

I = ( P * R * T ) /100

P is the Principal

R is the Rate of Interest

T is the Time Period

Here

P = $ 6000

R= 9 %

T = 30 months = 30/12 year = 2.5 years

I = ( 6000 * 9 * 2.5 ) / 100

Interest = $1350

Therefore , the total amount of interest Dominick will pay throughout the life of the loan is $1350

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Answer:

  X = 91.50

Step-by-step explanation:

The relation that defines a Z value can be used to find an X value when the appropriate parameters are given.

The equation for finding the Z-score associated with an X-value is ...

  Z = (X -μ)/σ

Solving this for X using the values given, we have ...

  3.15 = (X -60)/10

  31.5 = X -60 . . . . . . . multiply by 10

  91.5 = X . . . . . . . . add 60

The random variable value is ...

  X = 91.50

Answer:

Step-by-step explanation:

Solution

The factored form is going to be the HCF (highest common factor)

The fest way to do this is to turn this into primes.

8x^2 + 12x

8x^2 = 2*2*2*x*x

12x = 2 * 2 * x

Now bold the HCF.

8x^2 = 2*2*2*x*x

12x = 2 * 2 * x

The HCF = 2*2*x

Divide that into the original question to determine the second factor.

8x^2 / 4x = 2x

12x / 4x = 3         Notice how the x-s cancel

Answer

4x (2x + 3)

The vertical stretch of f(x) to g(x) is a factor of 5

The functions are given as:

f(x) = x

g(x) = 5x

Substitute f(x) = x in g(x) = 5x

g(x) = 5f(x)

In th above equation, the factor is 5.

5 is greater than 1 (this means vertical stretch)

Hence, the vertical stretch of f(x) to g(x) is a factor of 5

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Step-by-step explanation:

this is an arithmetic sequence :

a1 = 1

an = an-1 + 2 = a1 + (n-1)×2

the sum of n terms of an arithmetic sequence is

S = n×(a1 + an)/2

n = 5000

an = a1 + 4999×2 = 9999

S = 5000×(1 + 9999)/2 = 5000×5000 = 25,000,000

Answer:

Every natural number is also a rational number but not every rational number is a natural number because the set of natural numbers is a subset of the set of rational numbers.

Explanation:

Since all natural numbers, n can be written as n/1. Thus all natural numbers are rational. Since 3/4 is a rational number but not natural thus all rational numbers are not natural.

Hint:

Natural numbers : All positive numbers except zero.

Rational numbers: All numbers in the form of p/q, where q ≠ 0 (p,q are integers)

Answer: Line 3 to line 4

Step-by-step explanation:

When dividing by a negative, you need to flip the inequality sign.

Answer:

Yes

Step-by-step explanation:

In mathematics, there are real numbers, imaginary numbers, and complex numbers. Is there any other category? We have infinite Cardinal and Ordinal numbers, not covered above.

Step-by-step explanation:

that is a tricky question.

basically all numbers we know are either a real or an imaginary number.

but there are many sub-types and one super-type that are defined in mathematics.

the superset of real and imaginary numbers is called complex numbers. that means it contains all real and all imaginary numbers.

the real numbers have then many sub-types :

e.g.

natural numbers

whole numbers

integer numbers

rational numbers

irrational numbers

so, you see, if the question means if there are any additional forms of numbers than real and imaginary numbers, then no.

if the question means if there are more number type definitions than just real and imaginary numbers, then yes.

Answer:

Option (2)

Step-by-step explanation:

cos 50° = y/z

z = y/cos 50°

The slope of the tangent line to the curve at (8, 2) is given by the derivative [tex]\frac{dy}{dx}[/tex] at that point. By the chain rule,

[tex]\dfrac{dy}{dx} = \dfrac{dy}{dt} \times \dfrac{dt}{dx} = \dfrac{\frac{dy}{dt}}{\frac{dx}{dt}}[/tex]

Differentiate the given parametric equations with respect to [tex]t[/tex] :

[tex]x = 4t \implies \dfrac{dx}{dt} = 4[/tex]

[tex]y = \dfrac4t \implies \dfrac{dy}{dt} = -\dfrac4{t^2}[/tex]

Then

[tex]\dfrac{dy}{dx} = \dfrac{-\frac4{t^2}}4 = -\dfrac1{t^2}[/tex]

We have [tex]x=8[/tex] and [tex]y=2[/tex] when [tex]t=2[/tex], so the slope at the given point is [tex]\frac{dy}{dx} = -\frac14[/tex].

The normal line to the same point is perpendicular to the tangent line, so its slope is +4. Then using the point-slope formula for a line, the normal line has equation

[tex]y - 2 = 4 (x - 8) \implies \boxed{y = 4x - 30}[/tex]

Alternatively, we can eliminate the parameter and express [tex]y[/tex] explicitly in terms of [tex]x[/tex] :

[tex]x = 4t \implies t = \dfrac x4 \implies y = \dfrac4t = \dfrac4{\frac x4} = \dfrac{16}x[/tex]

Then the slope of the tangent line is

[tex]\dfrac{dy}{dx} = -\dfrac{16}{x^2}[/tex]

At [tex]x = 8[/tex], the slope is again [tex]-\frac{16}{64}=-\frac14[/tex], so the normal has slope +4, and so on.

The given statement m<COX = m<COA + <AOX is TRUE

A protractor is a mathematical instrument for measuring angle. From the given protractor, we have that;

The measure of angle COA and angle AOX is equivalent to angle COA. Mathematically;

m<COX = m<COA + <AOX

This shows that the given statement is TRUE

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The number which represent tens digit of a number is twice the ones digit is;

Complete question:

The tens digit of a number is twice the ones digit. The sum of the digits in the number is

12. What is the number?

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Answer:

C

Step-by-step explanation:

please mark brainliest if correct

The subtraction of complex numbers [tex]z_{1} -z_{2}[/tex] is cos(π)+i sin(π).

Given [tex]z_{1} =\sqrt{2}[/tex][cos(3π/4+i sin(3π/4) and [tex]z_{2}[/tex]=cos (π/2) +i sin(π/2)

We have to find the value of [tex]z_{1} -z_{2}[/tex].

A complex number is a number that includes real number as well as a imaginary unit in which [tex]i^{2} =1[/tex]. It looks like a+ bi.

We have to first solve [tex]z_{1} and z_{2}[/tex] and then we will be able to find the difference.

[tex]z_{1} =[/tex][tex]\sqrt{2}[/tex][ cos (3π/4)+i sin (3π/4)]

[tex]=\sqrt{2}[/tex][cos(π-π/4)+ i sin (π-π/4)]

=[tex]\sqrt{2}[/tex] [-cos(π/4)+sin (π/4)]

=[tex]\sqrt{2}[/tex](-1/[tex]\sqrt{2}[/tex]+1/[tex]\sqrt{2}[/tex])

=[tex]\sqrt{2} *0[/tex]

=0

[tex]z_{2} =[/tex]cos(π/2)+i sin (π/2)

=0+i*1

=1

Now putting the values of [tex]z_{1} and z_{2}[/tex],

[tex]z_{1} -z_{2} =0-1[/tex]

=-1

=-1+i*0

=cos (π)+i sin(π)

Hence the value of difference between [tex]z_{1} and z_{2}[/tex] is cos(π)+i sin(π).

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After 20 years of depositing and investing there will be 168474.01 dollars in your account.

It is defined as the interest on the principal value or deposit and the interest which is gained on the principal value in the previous year.

We can calculate the compound interest using the below formula:

[tex]\rm A = P(1+\dfrac{r}{n})^{nt}[/tex]

Where A = Final amount

          P = Principal amount

          r  = annual rate of interest

          n = how many times interest is compounded per year

          t = How long the money is deposited or borrowed (in years)

The formula for calculating how much money will your account be worth after 20 years of depositing and investing is:

P = $250, r = 9% = 0.09, t = 20 years, n = 12 and PMD = $250(per month deposit)

[tex]\rm A = P(1+\dfrac{r}{n})^{nt}+\dfrac{PMD((1+\dfrac{r}{n})^{nt}-1)}{\dfrac{r}{n}}[/tex]

[tex]\rm A = 250(1+\dfrac{0.09}{12})^{12\times20}+\dfrac{250((1+\dfrac{0.09}{12})^{12\times12}-1)}{\dfrac{0.09}{12}}[/tex]

A = 1502.287 + 166971.717

A = $168474.01

Thus, after 20 years of depositing and investing there will be 168474.01 dollars in your account.

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The ordered pairs that represent functions are:

For a set of ordered pairs to represent a function, the following must be true:

The x value must point to only one y value

In {(-3, 10), (-2, 13), (3, 13), (8, 12)}  and {(-4,11), (5, 10), (-3, 3), (-1, 10)}, the x value point to only one y value

Hence, {(-3, 10), (-2, 13), (3, 13), (8, 12)}  and {(-4,11), (5, 10), (-3, 3), (-1, 10)} are functions

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Answer:

18

Step-by-step explanation:

Let x be the unknown number.

Given information:

Factor Pair:  

A pair of numbers that multiply together to give the original number.

We can immediately discount prime numbers since prime numbers only have one factor pair:  itself and one.

Remaining numbers: 1, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18.

Of the remaining numbers, only 12, 16 and 18 have more than 2 pairs of factors:

Factors of 12:   1 and 12, 2 and 6, 3 and 4

Factors of 16:   1 and 16, 2 and 8, 4 and 4

Factors of 18:   1 and 18, 2 and 9, 3 and 6

If the pairs of factors sum to 19, 11 and 9, then the number must be 18.

Final answer:

Area of tile is 14 cm².

Step-by-step explanation:

Area of triangle is:

[tex]\frac{1}{2} base.height[/tex]

Putting [tex]b=3.5[/tex] and [tex]h=8[/tex] in [tex]\frac{1}{2} base.height[/tex]

[tex]\frac{1}{2}bxh=\frac{1}{2}3.5x8[/tex]

[tex]=3.5x4[/tex]

[tex]=14[/tex]

The correct answers to the question are:

A. b

B. c.

C. (1.486, 1.594)

d. b

This is because it would help to make the mean normal. This is given that the distribution for eating and drinking is not properly skewed.

B. The random sample of 972 is less than the population by 5 percent so it can be said to have satisfied the requirement. option c

C. sample size n = 972

mean = 1.54

sd = 0.65

1 - 0.99 = 0.01

Z0.01/2 = 2.58

The confidence interval would be gotten as

1.54 ± 2.58 ( 0.65/√972)

= 1.54 ± 2.58*0.021

= 1.54 - 0.054 , 1.54 + 0.054

= (1.486, 1.594)

d. The correct answer is b. The mean may differ given that the interval is about those that are 15 or more.

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5. A nutritionist wants to determine how much time nationally people spend eating and drinking. Suppose for a random sample of 969 people age 15 or older, the mean amount of time spend eating or drinking per day is 1.85 hours with a standard deviation of 0.67 hours. Complete parts (a) through (d) below.

A). A histogram of time spends eating and drinking each day is skewed right. Use this result to explain why a large sample size is needed to construct a confidence interval for the mean time spent eating and drinking each day.

a. The distribution of the sample mean will always be approximately normal.

b. Since the distribution of time spent eating and drinking each day is not normally distributed (skewed right), the sample must be larger so that the distribution of the sample mean will be approximately normal.

c. Since the distribution of time spent eating and drinking each day is normally distributed, the sample must be larger so that the distribution of the sample mean will be approximately normal.

d.The distribution of the sample mean will never be approximately normal.

B). In 2010, there were over 200 million people nationally age 15 or older. Explain why this, along with the fact that the data were obtained using a random sample, satisfies the requirements for constructing a confidence interval.

a. The sample size is less than 10% of the population.

b. The sample size is greater than 5% of the population.

c. The sample size is less than 5% of the population.

d. The sample size is greater than 10% of the population.

C). Determine and interpret a 99% confidence interval for the mean amount of the time Americans age 15 or older spend eating and drinking each day. Select the correct choice and fill in the blanks.

a. There is a 99% probability that the mean amount of time spent eating and drinking per day is between _____ and _____ hours.

b. The nutritionist is 99% confident that the amount of time spent eating and drinking per day for any individual is between _____ and _____ hours.

c. The nutritionist is 99% confident that the mean amount of time spent eating and drinking per day is between _____ and _____ hours.

d. The requirements for conducting a confidence interval are not satisfied.

D). Could the interval be used to estimate the mean amount of time a 9 year old spends eating and drinking each day?

a. Yes; the interval is about the mean amount of time spend eating and drinking per day for people age 15 or older and can be used to find the mean amount of time spent eating and drinking per day for a 9 year olds.

b. No; the interval is about people age 15 or older. The mean amount of time spent eating and drinking per day for 9 years old may differ.

c. No; the interval is about individual time spent eating and drinking per day and cannot be use to fin the mean time spent eating and drinking per day for specific age.

d. Yes; the interval is about individual time spent eating and drinking per day and can be used to find the mean amount of time a 9 year old spends eating and drinking each day.

e. A confidence interval could not be constructed in part (c)

The measure of angle x from the diagram is 100 degrees

The formula for calculating the sum of interior angle of a polygon is given as:

s = (n-2)180

Since hexagon has 6 interior angles, the sum of the interior will be 720 degrees. Hence

x  + 620 = 720

x = 720 - 620

x= 100

Hence the measure of angle x from the diagram is 100 degrees

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Answer:

[-20.25;+∞).

Step-by-step explanation:

1) according to the properties of the given parabola the minimum is:

[tex]x_0=-\frac{-7}{2}=3.5; \ y_0=-20.25;[/tex]

2) y₀=-20.25 means, the value -20.25 is minimum of the range, the maximum →+∞;

3) finally, the range y≥-20.25.