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Answer:

I didn't understand the question

Step-by-step explanation:

I think u have written wrong question..

[tex] \bold{x_{1}=+9 \: or \: \: x_{2}=-9}[/tex]

This question is very simple because it asks us to solve the equation using square roots. We don't need to find any important information as this problem is quite simple. We just need to take into account some rules for moving terms from one member to another and we will get our answer.

Given the equation:

[tex] \bold{{x}^{2} - 81 = 0}[/tex]

Move -81−81 to the other member, this subtraction happens by doing the opposite operation, that is, it happens by adding.

[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:\bold{{x}^{2} = 81}[/tex]

We add square root to remove the exponent.

[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:\bold{{ {x}} = \sqrt{81}}[/tex]

[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \bold{x = ±9}[/tex]

∴ The solutions we have for this equation are both 9 and -9. And if we want to check our results, we can plug in the values into x and we'll see that both 9 and -9 are values that satisfy the equation, since negatives don't matter when we're squaring numbers.

Answer:

Step-by-step explanation:

x² - 81 = 0

x² = 81

x = √81

x = 9

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

9² = 81

81 = 81

the answer is good

Hey there!

Answer:

[tex]b=3,-\frac{8}{3}, -\frac{5}{2}[/tex]

Hope this helps!

Answer:

Step-by-step explanation 0% because there is more red markers

Answer: (Don't read this if this is a test)

Step-by-step explanation: I might get this wrong because I was kind of confused too (sorry if I am!)

Hello! The first thing you would want to do for these kinds of questions is to write the probability of a green, blue, or red marker being picked as a fraction.  To do this, add 12 + 4 + 20 which is 36.

The probability of picking a green marker - 12/36, partially simplified = 3/9

The probability of picking a blue marker - 4/36, simplified = 1/9

The probability of picking a red marker - 20/36, simplified = 5/9

G - 3/9
B = 1/9
R = 5/9

You know that the probability of picking a blue marker is 1/9.  Once you know this, you can figure out the new probability of picking a red marker since the blue marker won't be replaced.  The answer is 4/35.  Multiply 1/9 by 4/35 to find the probability of picking one after the other and you will get 4/315.  

Using the information given, select the statement that can deduce the line segments to be parallel. If there are none, then select none.

When m8 = m4, the line segments are parallel.

When two line segments have the same slope (m8 = m4), then the line segments are parallel. Therefore, the statement that the line segments are parallel can be deduced if m8 and m4 are equal.

When two line segments have the same slope, then they will be parallel to each other. This can be deduced when the slopes of both line segments are equal, which is represented by m8 = m4. If the two line segments have the same slope, then they will be parallel to each other and will never meet or intersect. This is because parallel lines always have the same slope and never touch each other. In conclusion, the statement that two line segments are parallel can be deduced if m8 and m4 are equal.

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An inequality for x considering the figure is written as

the value of x is 82.5

x cannot be right angle because it will be against the rule of angle in a point is 360 degrees

The inequality that represents the figure in terms of x is written using the knowledge that angles in a point is 360 degrees

x + 2x + x + 30 < 360

adding like terms

4x + 30 < 360

solving for x

4x < 360 - 30

4x < 330

x < 82.5

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The mode in data set of 12 students that gives the number of pets is 4, 3,0 as these number has frequently  many times .

The mode is the value that occurs the most frequently in a data set when it is unique. Like the median and mean, it can be used as a measure of central tendency. However, there may be multiple modes or none at all at times. When all observed values appear in a data set the same number of times, there is no mode.

The value that appears most frequently in a data set is the mode. One mode, multiple modes, or none at all can be present in a data set. The mean, or the set's average, and the median, or the set's middle value, are two other common measures of central tendency.

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Student A has visited Website B: w(A,B).

This statement can be expressed in English as: "Student A has visited Website B." The formula for this statement is w(x, y), where x is the student, and y is the website. To calculate this statement, we would substitute A for x, and B for y, resulting in w(A, B). This tells us that Student A has visited Website B., we can use the formula w(x,y) = x * y, where x is the total number of students in the school and y is the total number of websites. For instance, if there are 100 students and 10 websites, then the total number of visits would be 100 * 10, or 1000 visits.

The statement "Student A has visited Website B" can be expressed in the formula w(x, y), where x is the student, and y is the website. To calculate this statement, we would substitute A for x, and B for y, resulting in w(A, B), which tells us that Student A has visited Website B.

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The graph of the ordered pairs is plotted using the x- coordinates and the y-coordinates. As the straight line does not pass through all the points the relationship is not a linear function.

One variable is directly proportionate to the other in a linear connection, which is a sort of connection between two variables. To put it another way, one variable rises or falls linearly as the other one rises or falls, correspondingly. A line graph, in which the rate of progression is constant, is a frequent graphic depiction of a linear connection. Numerous branches of research, such as physics, psychology, and economics, utilize linear correlations.

The graph of the ordered pairs is plotted using the x- coordinates and the y-coordinates.

When the points are connected using a straight line, the line does not pass through the last point (4, 4). Thus, the ordered pairs do not represent a linear function. This can be determined using the graph, and the points through with the straight line passes.

As the straight line does not pass through all the points the relationship is not a linear function.

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The decimal number will be rounded to the nearest hundredth value as 1.93 to the nearest hundredth.

Look at the rightmost place value to see how to round a number to the closest hundredth (the thousandths this time). In the same way, simply eliminate all the digits to the right if the number is four or less. Remove all the digits to the right after adding 1 to the digit in the hundredths position if the number is five or above.

Take into account the hundredths place (9) to convert 1.299 to the nearest tenth, 1.3. To round to the nearest hundredth, consider the thousandths place (9) The tenth would be rounded up in this situation to the nearest whole number, 1.30, which is equal to 1.3.

   Cos θ= adj/hyp

   Cos 74° = x/7

         x = 1.93

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Here b is =0, According to the Zero Product Property, if ab=0, then either a=0 or b=0 (or both). If and only if one or more of the factors in a product are zero, the product is zero. This is very helpful when attempting to solve quadratic problems.

The product of two nonzero items is not zero, according to the algebraic definition of the zero product property. In other terms, the following claim:

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The volume of the sphereical globe is  1564in³

We know that when we talk about the volume we have to look at the volume of the box. Let us assume that the box in the problem that we have here is a cubic box, it the follows that the volume of the box is obtained from;

6l^3 = 2197in³

Where l is the length of each side in inches

l = ∛ 2197/6

l = 7.2 inches

This is the radius of the spherical globe

Volume of a sphere = 4/3πr^3

V = 4/3 * 3.142 * (7.2)^3

V = 1564in³

Hence 1564in³ is the volume of the globe.

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The slope-intercept form of the equation is y = (-5/3)x + 19

Her set-up time decrease by 5/3 hours/day

The equation of a line is an algebraic form of representing the set of points, which together form a line in a coordinate system

(a) The slope-intercept form of  the equation of a line is y = mx+b,

where m is the slope (rate) and b is the y-intercept (starting point)

Let y be the set up time (hours) and x be the time (days)

m = (y₂-y₁)/(x₂-x₁)

where (x, y) are the coordinate of points on the line

From the graph: x₁ =3, y₁ = 14 and x₂ = 6, y₂ = 9

m = (9-14)/(6-3) = -5/3

y = mx + c

14 = (-5/3)×3 + c

14 = -5 + c

c = 14 + 5

c = 19

Thus, the equation is y = (-5/3)x + 19

(b) At day 0, x = 0:

y = (-5/3)x + 19

y = (-5/3)(0) + 19

y = 19 hours

The slope is decrease rate. Thus, her set-up time decrease by 5/3 hours/day

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Answer: 1 3/4 = 3/4 + 3/4 + 1/4, or 1/4+ 1/4+ 1/4+ 1/4+ 1/4+ 1/4+ 1/4

Step-by-step explanation:

The expression is A = (1/4 pi) * (C^2) when The area of a circle is the product of the number 1/4(pi) and the square of the circumference.

What is Area of circle?

Area of circle can be defined as the product of pi and square of radius of a circle.

Given ,

we have transform the sentence into a mathematical equation

so A is used to represent the area

and C is used to represent the circumference

And condition is

The area of a circle is the product of the number 1/4(pi) and the square of the circumference

SO,

A = (1/4 pi) * (C^2)

Hence, The expression is A = (1/4 pi) * (C^2) when The area of a circle is the product of the number 1/4(pi) and the square of the circumference.

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Answer:

Circumference = 2π

Step-by-step explanation:

The formula for a circle's circumference is:

C = 2πr

Here is a quick breakdown:

C = circumference

r = radius

Since we are given that the radius is 1 mile, we can plug in r into the formula above:

C = 2π(1)

C = 2π

Answer: The truth value of a conditional statement can be determined by using the truth table for the conditional operator (->). The truth table for the conditional operator is as follows:

p q p -> q

T T T

T F F

F T T

F F T

To determine the truth value of a conditional statement r, you need to know the truth values of the individual propositions contained in r. Once you have the truth values of the individual propositions, you can use the truth table to determine the truth value of the entire conditional statement. If the conditional statement is true, then it is represented by "T", otherwise it is "F".

Step-by-step explanation:

Answer:

y=5/7

Step-by-step explanation:

-7y=-34+29

-7y=-5

y=-5/-7

y=5/7

Answer:

y = 9

Step-by-step explanation:

-x -7y = -34

if x = -29:

-(-29) -7y = -34

+29 - 7y = -34

-7y = -34 - 29

-7y = -63

y = -63/-7

y = 9

Check:

-(-29) - (7*9) = -34

29 - 63 = -34

0.708 more of the deck did connor take than ethan.

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

here, we have,

connor takes 7/8 of the cards from a deck,

ethan took 1/6 of the cards from the same deck.

i.e. difference of them = 7/8 - 1/6

                                      =0.708

Hence, 0.708 more of the deck did connor take than ethan.

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The provided rectangular box's surface area as a function of the base's side length is S(a) = a² + 8/a.

A solid object's surface area is a measurement of the overall space that the object's surface takes up.

In comparison to the definition of arc length for one-dimensional curves or the definition of surface area for polyhedra (i.e., objects with flat polygonal faces), where the surface area is the sum of the areas of its faces, the mathematical definition of surface area in the presence of curved surfaces is significantly more complex:

Let a be the base's side length and h be the box's height. We are aware that the formula: can be used to calculate the volume of a rectangular box.

V = length * Width * Height

Since the base of this particular box is square,

l = a

w = a

h = h

Now, if we plug these values into the volume formula, we'll get:

2 = a*a*a

2  =a²h

h = 2/a²

Since the surface area up until this point will depend on only two variables, the objective was to minimize the number of variables.

We had to calculate h in terms of a because we wanted to make it a function of a.

We may now apply these to the box's surface area.

Given that this is an open rectangular box, one of the bases in the formula must be removed.

[tex]\begin{aligned}S & =2(b h+h l)+l b \\S & =2(a h+h(a))+a(a) \\S & =2(2 a h)+a^2 \\S & =a^2+4 a h \\S(a) & =a^2+4 a\left(\frac{2}{a^2}\right) \\S(a) & =a^2+\frac{8}{a}\end{aligned}[/tex]

Therefore, the provided rectangular box's surface area as a function of the base's side length is S(a) = a² + 8/a.

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Answer: It's the top right

Step-by-step explanation:

Every time the line hits a point on a line where the x and y values are whole numbers, it rises 3 and goes over 2 to get to the next point.

Answer:

Step-by-step explanation: (Do not read this if it is a test)

Hello! 2 + 7x = 4x + 3 + 3x - 8.  How you first want to do this is to solve for x.  7x + 2 = 4x + 3 + 3x - 8.  Simplify the like terms.  7x + 2 = 4x + 3x + 3 - 8 is also equal to 7x + 2 = 7x - 5.  Subtract 2 from both sides.  7x = 7x - 7.  Divide both sides by 7.  7x/7 = 7x/7 - 7/7.  The answer is x = x - 1.  There is no solution because x cannot equal x minus 1.  An example of this is 3 cannot equal 3 - 1 or 2.  3 does not equal 2.  The answer is C.

Answer:The answer is C.

Step-by-step explanation:Hello! 2 + 7x = 4x + 3 + 3x - 8.  How you first want to do this is to solve for x.  7x + 2 = 4x + 3 + 3x - 8.  Simplify the like terms.  7x + 2 = 4x + 3x + 3 - 8 is also equal to 7x + 2 = 7x - 5.  Subtract 2 from both sides.  7x = 7x - 7.  Divide both sides by 7.  7x/7 = 7x/7 - 7/7.  The answer is x = x - 1.  There is no solution because x cannot equal x minus 1.  An example of this is 3 cannot equal 3 - 1 or 2.  3 does not equal 2.

A. The probability that a sample of taxpayers from this income group are:

n = 30: 0.8159

n = 50: 0.8796

n = 100: 0.9332

n = 400: 0.9984

B. Advantages of a larger sample size are:

it increases precision

reliability of estimate of the population mean

standard error of the mean decreases

Using the z-score below:

For a sample size of 30, the z-score is 1.28.

For a sample size of 50, the z-score is 1.64.

For a sample size of 100, the z-score is 2.33.

For a sample size of 400, the z-score is 3.29.

a. The probability that a sample of taxpayers from this income group who have itemized deductions will show a sample mean within $157 of the population mean for each of the following sample sizes:

n = 30: 0.8159

n = 50: 0.8796

n = 100: 0.9332

n = 400: 0.9984

b. The advantage of a larger sample size when attempting to estimate the population mean is that it increases the precision and accuracy of the estimate. As the sample size increases, the sample mean becomes a more reliable estimate of the population mean, and the standard error of the mean decreases.

In this case, as the sample size increases from 30 to 400, the probability of the sample mean being within 157 of the population mean increases from 0.8159 to 0.9984.

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Answer: 2/3

Step-by-step explanation: you are looking for the constant of proportionality. We find this with the following formula: K = Y/X

A cut parallel to the vertical axis, directly through the vertical axis. Option C is correct.

Axes for the figure are defined as the imaginary lines that toward which measurement of the figures are taken.

Here,
When cutting the pyramid through axis perpendicular axis to the vertical axis, the shape produced would be a quadrilateral. But when we cut the pyramid through the vertical axis it produces the triangle.

Thus, a cut parallels the vertical axis, directly through the vertical axis. Option C is correct.

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The measure of angle ∠B is 44°.

What is the measure of all angles in a triangle?

A triangle's angles add up to 180 degrees because one exterior angle is equal to the sum of the other two angles in the triangle. In other words, the other two angles in the triangle (the ones that add up to form the exterior angle) must combine with the third angle to make a 180 angle.

We have given,  

Triangle ΔABC,

and angles ∠ACB = 90°, ∠CAB= 46°, and ∠ABC = ?

We know that the sum of all angles in the triangle is 180°.

So,

∠ACB + ∠CAB + ∠ABC = 180°

90° + 46° + ∠ABC = 180°,

136 + ∠ABC = 180°,

∠ABC = 180° - 136

∠ABC = 44°,

Hence, the measure of angle ∠B is 44°.

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Answer:

33

Step-by-step explanation:

35*14/15

490/15

32.7

rounded up to 33 boxes

Answer:

32 Boxes

Step-by-step explanation:

Total Phones = 35 × 14 = 490

15 phones per 1 box

therefore = 490 ÷ 15 = 32.67

Answer is 32 Boxes

The initial number of people sick with the flu at time 0 is 100 and the rate of increase of the number of people sick with the flu is 120t - 3t^2 people per day.

P(t) = 100 + 120t - 3t^2

This formula can be used to calculate the number of people sick with the flu at time t, where time is measured in days from the beginning of the epidemic. The initial number of people sick with the flu at time 0 is 100 and the rate of increase of the number of people sick with the flu is 120t - 3t^2 people per day.

To calculate P(t), the initial number of people sick with the flu, 100, is added to the rate of increase of the number of people sick with the flu over t days, which is 120t - 3t^2. The sum of these two values is the number of people sick with the flu at time t.

For example, at t=2 days, P(2) = 100 + 120(2) - 3(2^2) = 100 + 240 - 12 = 328 people sick with the flu.

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The potential energy of the system to the conservative force acting on the particle is   [tex]U=\frac{Ax^2}{2} -\frac{Bx^2}{2}[/tex]

(a) The potential energy of the system to the conservative force acting on the particle, with Ui=0:

U=Uf−Ui=Uf−0

[tex]U=-\int\limits^x_0 {-Ax+Bx} \, dx \\\\U=\int\limits^x_0 {A\frac{x}{2}+B\frac{x}{2} } \, dx \\\\U=A\frac{x^2}{2} -B\frac{x^2}{2} \\\\[/tex]

(b) From (a), U(1.80m)=2A–2.67B, and U(3.40m)=4.5A–9B.

ΔU=(4.5A−9B)−(2A−2.67B)

ΔU=2.5A−6.33B

If we consider the particle alone as a system, the change in its kinetic energy is the work done by the force on the particle: W=ΔK.

For the entire system of which this Particle is a member, this work is internal work and equal to the negative of the change in potential energy of the system:

ΔK=−ΔU

ΔK=−2.5A+6.33B

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