what is the minimum number of students required in a school to be sure that at least 17 students will be in the same class, assuming the school only has grade 1 to grade 6 and each grade has only one class?

Answer:

1. 918

2. 2880

3. 2678

4. 22554

5. 66014

6. 44208

Hello!

To expand:

 ==> we must multiply each variable with each other

  [tex](x+2)(x+1)=x*x+x*1+2*x+2*1=x^2+x+2x+2=x^2+3x+2[/tex]

Thus: when (x+2)(x+1) is expanded and simplified

 ==> [tex]x^2+3x+2[/tex]

Answer:

Step-by-step explanation: First we will expand so

x times x = x^2

x times 1 = x ( don’t need to put 1 in front)

2 times x is = 2x

2 times 1 = 2

Now we line them all up and look out if there are any like terms.

x^2 + x + 2x + 2 = x^2 +3x + 2

Answer: The first and the last answer choice

Step-by-step explanation:

They are equal to 8k=20 because they are the same equation but reduced or increased by the same multiple.

Answer:

it's the first option, 3rd option, and fifth option because the rest of the equation cancels out on them (ex. for the first option, divide each side by 3 that would remove the •3 from each side and leave you with 8k=20)

Answer:

h

Step-by-step explanation:

Answer:

According to graph calculators online, there is no solution to this equation.

Step-by-step explanation:

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The quotient of 7.81 × 10⁶ and 7.1 × 10³ expressed in scientific notation is approximately 1.10 × 10³.

To find the quotient of 7.81 × 10⁶ and 7.1 × 10³ expressed in scientific notation, we can perform the division first and then convert the result into scientific notation.

Step 1: Perform the division: (7.81 × 10⁶) ÷ (7.1 × 10³)

Step 2: Divide the numerical values: 7.81 ÷ 7.1 = 1.09859155 (approximately)

Step 3: Divide the exponents of the powers of 10: 10⁶ ÷ 10³ = 10³ (since 6 - 3 = 3)

Step 4: 1.09859155 × 10³

Step 5: Adjust the result to be in scientific notation format: 1.09859155 × 10³ ≈ 1.10 × 10³

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The complete question:

What is the quotient of 7.81 × 10⁶ and 7.1 × 10³ expressed in scientific notation?

Answer:

Amara

Step-by-step explanation:

You can find mean by adding the total number of texts sent by each person and dividing it by the number of days.

In this case, the mean of Amara's texts sent is 6.714...

The mean of Marquis' texts sent is 9.428...

Therefore, Amara has the smaller mean.

By definition of slope , we have seen that Slope = 4/3 and 4/3 = 16/12

The slope of a line is basically a measure of its steepness. Mathematically, the slope is calculated as rise over run.

To find the slope, we divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points. This is change in y divided by change in x.

From definition of slope, we know that;

Slope between line D and E is; Slope = 4/3

Similarly, by definition of slope, we know that;

Slope between line D and E is; Slope = 16/12

Now, 16/12 can be reduced to 4/3 and as such;

4/3 = 16/12

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As per the standard distribution, the lowest test score is 27.76%

Standard distribution:

In statistics, standard distribution means a normal distribution with a mean of zero and standard deviation of 1.

Given,

The top 5% of applicants on a test will receive a scholarship. if the test scores are normally distributed with a mean of 76 and a standard distribution of 12.

Here we need to find the lowest test score that still qualifies for a scholarship.

As per the given question, we have identified the value of

=> μ = 76 (mean)

=> σ = 12 (standard deviation)

Then we need to take the value of x as,

x < 5% (find the probability)

Now, converting the problem in standard form

=> Z = (5 − 76) / 12

=> Z = -5.91

Then as per the z table the value is 0.2786

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The number of bars of soap that the soap maker ship to the store is 90.

From the information, the soap maker wants to ship as many bars of soap as she can to a store. Each bar of soap weighs 1/5 pound.

Since the box that she will use to ship the soap can hold a maximum of 18 pounds of soap. The number of soaps will be:

= 18 ÷ 1/5

= 18 × 5

= 90

The number of soaps is 90.

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This is a total of 2^32×2^16×2^8×2^4×2^2×2^1 possible outcomes that is 2^63 outcomes.

The basic counting concept is a method for keeping track of all the potential outcomes in a scenario. It indicates that there are nm methods to carry out both of these activities if there are n ways to carry out one action and m ways to carry out another action after that. How selection is made based on options is determined by the Fundamental Principle of Counting. The approach of selection, taking into account all of the potential options and their combinations for calculating the probability, is made simpler by the Fundamental Principle of Counting.

Here,

Since I don't know anything about NCAA's March Madness, I'll assume that you're talking about a 64-team single-elimination tournament.

In the first round, there are 32 games, each with 2 possible outcomes. This provides for a total of 2^32 possibilities.

In the next round, there are only 16 games, again each with 2 possible outcomes, for a total of 2^16 possibilities.

You keep going, eliminating half of the players each round and taking half as long as the previous round to play the games out, until the finals, at which point there is 1 game with 2 possible outcomes.

This is a total of 2^32×2^16×2^8×2^4×2^2×2^1 possible outcomes that is 2^63 outcomes.

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68.18% is the right answer

The sampling process used on dollar street is stratified sampling.

Given,

Use of dollar street;

Dollar street offers a fresh perspective on families all throughout the world. Every family is arranged down a street, with the wealthiest household on the right and the lowest on the left. Each family's earnings are expressed in US dollars.

Here,

Stratified sampling;

To complete the sampling process, stratified sampling is a form of sampling technique in which the entire population is divided into smaller groups or strata.

Therefore,

Stratified sampling is used in dollar street for sampling process.

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Answer25

Week good :

Step-by-step explanation:

Answer:when you're working hard for 4 year graduation and will cost you, 10177.84 for whole 4 year

Answer:

x = 2, y = 2

Step-by-step explanation:

Looking at the equations,

x + 4y = 10

2x + 8y = 20

If x = 2, and y = 0 then it would look something like this:

2 + (4×2) = 10

Let's apply that to the next equation:

(2×2) + (8×2) = 20

In conclusion, x = 2, y = 2

One pipe takes 6 hours to fill the pool and the other takes 12 hours.

Pipe A fills 1/x of the pool per hour, and Pipe B fills 1/y of the pool per hour. In other words, A takes x hours to fill the pool and B takes y hours to fill the pool.

Together, they fill 1/x + 1/y of the pool per hour. So, 4 hours times that rate should equal 1 full pool, since together they take 4 hours to fill the pool. That gives you your first equation:

4(1/x + 1/y) = 1

You're also told that if one pipe fills half the pool and the other takes over to fill the rest, it will take 9 hours. We don't know how long Pipe A works, so call that number of hours t. Pipe B must work for 9 - t hours.

So, Pipe A, working for t hours, fills half the pool:

t(1/x) = 1/2

And Pipe B, working for 9 - t hours, fills half the pool:

(9-t)(1/y) = 1/2

You now have a system of three equations (because this is an exceptionally complicated pipe-filling-pool problem):

4(1/x + 1/y) = 1

t(1/x) = 1/2

(9-t)(1/y) = 1/2

Solve for t in that second equation, then plug it into the third equation:

t(1/x) = 1/2

t = x(1/2)

t = x/2

(9 - x/2)(1/y) = 1/2

Now you've got a system of two equations:

4(1/x + 1/y) = 1

(9 - x/2)(1/y) = 1/2

Solve for y in the second equation, then plug that into the first equation:

(9 - x/2)(1/y) = 1/2

(9 - x/2) = y(1/2)

2(9 - x/2) = y

18 - x = y    (this is a really nice-looking form of that equation; we'll use it again later)

4(1/x + 1/y) = 1

4(1/x + 1/(18-x)) = 1

4/x + 4/(18-x) = 1

(4(18-x))/(x(18-x)) + (4x)/(x(18-x)) = 1

(4(18-x) + 4x)/(x(18-x)) = 1

4(18-x) + 4x = x(18-x)

72 - 4x + 4x = 18x - x2

72 = 18x - x2

x2 - 18x + 72 = 0

(x - 6)(x - 12) = 0

x - 6 = 0    OR    x - 12 = 0

x = 6   OR    x = 12

So, Pipe A takes either x = 6 or x = 12 hours to fill the pool alone.

When Pipe A takes 6 hours to fill the pool, Pipe B takes 12. When Pipe A takes 12 hours to fill the pool, Pipe B takes 6.

These cases are equivalent, since the original problem makes no distinction between the pipes.

Hence, one pipe takes 6 hours to fill the pool and the other takes 12 hours.

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Answer:

  (c)  {y|y ≥ 1}

Step-by-step explanation:

You want the range of the square root function after it has been translated left 4 units and up 1 unit.

The range of the function is the vertical extent of its graph. The original square root function has a range of y ≥ 0. Translating it up 1 unit gives it a range of ...

  y ≥ 1

The summation is Σ(xᵢ-4)², i=1,2,3...

What is summation ?

When a group of numbers, known as addends or summands, are added together in mathematics, the outcome is their sum or total. Functions, vectors, matrices, polynomials, and, generally, any sort of mathematical object on which an operation labelled "+" is defined can all be added together, in addition to numbers.

Series are summations of infinite sequences. They are related to the idea of limit but are not covered in this article.

Let x serve as the definition of a score.

Each score will be xi, i.e. x1, x2, x3, x4... for the first four consecutive scores, and so on.

By deducting 4 from each score, you get xi-4.

Squaring the Resulting Value = (xi-4)²

The sum of the squared numbers is equal to (xi-4)²

where i=1, 2, 3.

Σ(xᵢ-4), The set of instructions written in summation notation is 2.

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Σ(xᵢ-4)² is the set of instruction expressed in summation notation.

What is Summation Notation?

The summation symbol, S, tells us to add up the sequence's components. To the right of the summation sign is a typical component of the sequence that is being summed. An index that appears below the summation sign designates the variable of summation.

Let a score be defined by x,

Each score will be xᵢ i.e. x₁, x₂, x₃, x₄... for the first four consecutive scores and so on.

Subtracting 4 from each score = xᵢ-4

Squaring the Resulting Value = (xᵢ-4)²

The sum of the squared numbers = Σ(xᵢ-4)², i=1,2,3...

Σ(xᵢ-4)² is the set of instruction expressed in summation notation.

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5.152 L volume will it occupy at STP.

What is ideal gas law?

The equation of state for an ideal gas, in theory, is known as the ideal gas law. Even though it has a number of shortcomings, it provides a good approximation of the behavior of several gases under various circumstances. Theoretical point particles that move randomly and only collide in elastic ways make up an ideal gas.

Using the ideal gas equation PV=nRT, where n is the number of moles, it is possible to determine the volume that will be present at STP as follows.

n= PV/RT

p=0.974 atm

V=6.0  L

R = 0.0821  L.atm/k.mol

T=  35 +273= 308k

n=  (0.974 atm  x  6.0 L)/( 0.0821 L.atm/k.mol  x 308 k)=  0.178 moles

STP  1 mole=  22.4 L  what obout  0.23 moles

=22.4  x0.178moles/ 1moles =5.152 L

Hence, 5.152 L volume will it occupy at STP

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Answer: 220 meters in 1 minute

Step-by-step explanation:

if harper can run 2200 meters in 10 min then that means you can run 220 in 1 min

2200/10 = 220

Answer:

220

Step-by-step explanation:

2200/10 is 220

In the expression given as -5 - (-7) = -5 + x, the value of x is 7.

In Mathematics, expression simply means the mathematical statements which have at least two terms which are then related by an operator. It should be noted that they illustrate the relationship between the data given.

In this situation, it should be noted that the expression is given as:

-5 - (-7) = -5 + x

Collect like terms

-5 + 7 = -5 + x

x = -5 + 5 + 7

x = 7

The value of x is 7.

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The required percent of the total profit was not brought in by the sales department is 33%.

Simple Interest (S.I.) is the strategy for working out the premium sum for a specific chief measure of cash at some pace of revenue. For instance, when an individual takes a credit of Rs. 5000, at a pace of 10 p.a. for a considerable length of time, the individual's advantage for quite some time will be S.I. on the acquired cash.

profit amount = $1196.7

Amount used in sales =  $798.9

Amount was not used in sales = $1196.7 - $798.9 = $397.8

Now, then approximately percent of the total profit was not brought in by the sales department.

($397.8/$1196.7) × 100 = 33%

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The statements that are true about the ordered pair (−1, 5) and the system of equations include the following;

A. The ordered pair (−1, 5) is a solution to the first equation because it makes the first equation true.

B. The ordered pair (−1, 5) is a solution to the second equation because it makes the second equation true.

D. The ordered pair (−1, 5) is a solution to the system because it makes both equations true.

In order to determine if this ordered pair is a true solution based on the given system of linear equations, we would have to test the ordered pair (-1, 5) by substituting it into each of the linear equation as follows;

For the first linear equation, we have the following:

x + y = 4

-1 + 5 = 4

4 = 4 (True).

For the first linear equation, we have the following:

x - y = -6

-1 - 5 = -6

-6 = -6 (True).

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y - 9 = 1(x - 15) is the required equation for the tangent.

Equations come in two varieties: identities and conditional equations.

All possible values of the variables result in an identity.

Only certain combinations of the variables' values make a conditional equation true.

Two expressions joined by the equals symbol ("=") form an equation.

A mathematical statement known as an equation is made up of two expressions joined together by the equal sign.

A formula would be 3x - 5 = 16, for instance.

When this equation is solved, we discover that the value of the variable x is 7.

So, the equation of the tangent is:

First, with respect to t, differentiate the function as follows:

dx/dt = d(9t² + 6)/dt

dx/dt = 18t

Like this, we have:

dy/dt = d(6t³ + 3)/dt

dy/dt = 18t²

Now, we will obtain:
dy/dx = 18t²/18t

dy/dx = t

We know that (15, 9) occurs on the curve, so we got:

d(9t² + 6)/dt and d(6t³ + 3)/dt ⇒ t = ±1 and t = 1 ⇒ t = 1

So, (15, 9) is the slope.

y - 9 = 1(x - 15) is the equation of the tangent.

Therefore, y - 9 = 1(x - 15) is the required equation for the tangent.

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Correct question:
Find the equations of the tangents to the curve x = 9t2 + 6, y = 6t3 + 3 that passes through the point (15, 9).

There are 130 fern samples did the biologist collect.

What is fern and moss samples?

In contrast to ferns, which are vascular plants, mosses are nonvascular primitive plants that produce spores. Furthermore, unlike ferns, which have a plant body that is divided into real stems, leaves, and roots, mosses have none of these features. Ferns also have circinate vernation, which is not true of mosses.

Given:

A biologist collected 326 fern and moss samples. there were 66 fewer ferns than moss samples.

Let, f denotes the number of ferns collected and

m denotes the number of mosses collected

From the given information,

m + f = 326          ..(1)

m - 66 = f            ..(2)

Plug equation (2) in equation (1),

m + m - 66 = 326

           2m = 326 + 66

           2m = 392

             m = 196

Plug m = 196 in equation (2),

f = 196 - 66

f = 130

Hence, there are 130 fern samples did the biologist collect.

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The equation form as per the statement in the question will be y = -200x - 2000.

Equations are mathematical expressions that have two algebras on either side of an equal (=) sign. The expressions on the left and right are shown to be equal to one another, demonstrating this relationship. L.H.S. = R.H.S. (left-hand side = right side) is a fundamental simple equation.

As per the given information in the question,

They spent $2,000 therefore that would be -2,000, and they make $200 per month selling brownies.

So simply add -2,000 each time on the chart under "Income made," and the final amount should be 600.

So, the equation will be,

y = -200x - 2000.

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In an electrical system, components of categories I and II have a life expectancy measured in hundreds of hours, respectively. The probability of finding the combined density of Y1 and Y2 is equal to e^(−2).

The components of type I and type II, respectively, have random life spans denoted by the letters Y1 and Y2, respectively. Given by is the joint density function (Measurements are in hundreds of hours.)

Probability P(Y1 > 1, Y2 > 1) = ∫2¹∫1¹ (1/2)e^(−x−y) dx dy = e^(−2).

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Answer:

  about 2.758 cm/s

Step-by-step explanation:

You want the rate of change of a cylinder's radius, when its height is 33 cm increasing at 2 cm/s, and its volume is 403 cm³ increasing at 1152 cm³/s.

The volume of a cylinder is given by the equation ...

  V = πr²h

Solving for the radius gives ...

  r = √(V/(πh))

Differentiating, we have ...

  [tex]r'=\dfrac{1}{\sqrt{\pi}}\left(\dfrac{1}{2}V^{-\frac{1}{2}}h^{-\frac{1}{2}}V'-\dfrac{1}{2}V^{\frac{1}{2}}h^{-\frac{3}{2}}h'\right)=\dfrac{hV'-Vh'}{2h\sqrt{\pi Vh}}[/tex]

Filling in the values V = 403, V' = 1152, h = 33, h' = 2, we have ...

  r' = (33·1152 -403·2)/(2·33·√(π·403·33)) = 37210/(66√(13299π))

  r' ≈ 2.758 . . . . . cm/s

The rate of change of the radius is about 2.758 cm/s.