find the value of x in 2/3 (2x+4) +6=10​

Answer:

[tex]\frac{(s + 15.4)(8.1)}{2}[/tex] = 81

8.1s + 124.74 = 162

8.1s = 37.26

s = 4.6

Answer:

Step-by-step explanation:

The number of ways the hospital can purchase 5 machines and receive at least 2 of the defective machines is calculated as follows:

The number of ways the hospital can receive exactly 2 defective machines is C(4,2) = 6, where C(n, k) is the number of combinations of n things taken k at a time.

The number of ways the hospital can receive exactly 3 defective machines is C(4,3) = 4.

The number of ways the hospital can receive exactly 4 defective machines is C(4,4) = 1.

So, the total number of ways the hospital can purchase 5 machines and receive at least 2 of the defective machines is 6 + 4 + 1 = 11.

The best estimate of the difference between the two numbers is 31/12 or 2 7/12.

A mixed fraction is one that is represented by both its quotient and remainder. A mixed fraction is, for instance, 2 1/3, where 2 is the quotient and 1 is the remainder. An amalgam of a whole number and a legal fraction is a mixed fraction.

to transform a mixed fraction into an incorrect fraction.

By denominator, divide the numerator.

Take the quotient as a whole number and use the remaining amount as the proper fraction's numerator while maintaining the original denominator.

Covert the mixed fraction into improper fractions:

5 5/6 = 35/6

3 1/4 = 13/4

The difference between the two numbers is:

35/6 - 13/4

Take the LCM.

70/13 - 39/12

(70 - 39) / 12

31/12 = 2 7/12

Hence, the best estimate of the difference between the two numbers is 31/12 or 2 7/12.

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Answer: We can solve the system of equations using the substitution method.

First, we'll isolate "y" in one of the equations and substitute it into the other equation:

Y = x - 11

7x + 7y = -21

Substituting the first equation into the second equation:

7x + 7(x - 11) = -21

7x + 7x - 77 = -21

14x = 56

x = 4

Now that we have found the value of x, we can substitute it back into one of the original equations to find the value of y:

Y = x - 11

Y = 4 - 11

Y = -7

The solution to the system of equations is (x, y) = (4, -7).

Step-by-step explanation:

The value of x and y in the equation is 4 and -7 respectively

Simultaneous equations are two or more algebraic equations that share variables e.g. x and y . They are called simultaneous equations because the equations are solved at the same time. For example, below are some simultaneous equations: 2x + 4y = 14 4x − 4y = 4.

Using substitution method to solve the system,

y = x-11 equation 1

7x+7y = -21 equation 2

substitute x-11 for y in equation 2

7x + 7( x-11) = -21

7x + 7x -77 = -21

14x = -21+77

14x = 56

divide both sides by 14

x = 56/14

x = 4

substitute 4 for x in equation 1

y = 4-11

y = -7

therefore the value of x and y is 4 and -7 respectively

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a)The events A1, A2, and A3 are pairwise independent.

b)  The events are not mutually independent.

What is probability?

Simply put, probability measures how probable something is to occur. We can discuss the probabilities of various outcomes, or how likely they are, whenever we are unsure of how an event will turn out. Statistics is the study of events subject to probability.

Observe the given numbers:

Out of 4 numbers, 2 have 1 at first position

so outcomes in event A1 is

A1 ={ 110, 101}

Similarly, possible outcomes in A2 is

A2 ={110, 011}

A3 = {101,111}

The probabilities of events are

P(A1) = 2/4 = 0.5

P(A2) = 2/4 = 0.5

P(A3) = 2/4 = 0.5

Also,

(A1 and A2) = {110}

(A1 and A3) = {101}

(A2 and A3) = {011}

The probabilities are

P(A1 and A2) = 1 /4 = 0.25

P(A1 and A3) = 1 /4 = 0.25

P(A2 and A3) = 1 /4 = 0.25

a)

From above we have

P(A1 and A2) = P(A1)P(A2) = 0.25

P(A1 and A3) = P(A1)P(A3) = 0.25

P(A2 and A3) = P(A2)P(A3) = 0.25

So events A1, A2, and A3 are pairwise independent.

b)

Since P(A1 and A2), P(A1 and A3) and P(A2 and A3) are not equal to zero so events are not mutually independent.

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a)The events A1, A2, and A3 are pairwise independent.

b)  The events are not mutually independent.

What is probability?

Simply put, probability measures how probable something is to occur. We can discuss the probabilities of various outcomes, or how likely they are, whenever we are unsure of how an event will turn out. Statistics is the study of events subject to probability.

Observe the given numbers:

Out of 4 numbers, 2 have 1 at first position

so outcomes in event A1 is

A1 ={ 110, 101}

Similarly, possible outcomes in A2 is

A2 ={110, 011}

A3 = {101,111}

The probabilities of events are

P(A1) = 2/4 = 0.5

P(A2) = 2/4 = 0.5

P(A3) = 2/4 = 0.5

Also,

(A1 and A2) = {110}

(A1 and A3) = {101}

(A2 and A3) = {011}

The probabilities are

P(A1 and A2) = 1 /4 = 0.25

P(A1 and A3) = 1 /4 = 0.25

P(A2 and A3) = 1 /4 = 0.25

a)

From above we have

P(A1 and A2) = P(A1)P(A2) = 0.25

P(A1 and A3) = P(A1)P(A3) = 0.25

P(A2 and A3) = P(A2)P(A3) = 0.25

So events A1, A2, and A3 are pairwise independent.

b)

Since P(A1 and A2), P(A1 and A3) and P(A2 and A3) are not equal to zero so events are not mutually independent.

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In isosceles triangle ΔABE, the correct option is option D. which proves that BC ≅ ED.

What is the isosceles triangle?

An isosceles triangle is a triangle having any two sides equal in length. The third side is called the base of the isosceles triangle. In an isosceles triangle, the angles opposite to equal sides are equal in measure.

1.∠ABC ≅ ∠AED (Given)

2.  Isosc. △ABE, base BE (Given)

3.  AB ≅ BE (Def. of Isosc. △)

4.  ∠A ≅ ∠A (Reflex. Prop. of ≅)

5.  △ABC ≅ △AED (ASA Steps 1, 3, 4)

6.  BC ≅ ED (CPCTC)

option 1 is wrong in that the step 3. AB is not congurent with BE,

option 3 is wrong in that step 5.   △ABC≅△AED  should be prove by BD ≅ CE, ∠A BE ≅ ∠AEB, BE  ≅ BE

hence, in isosceles triangle ΔABE, the correct option is option D. which proves that BC ≅ ED.

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The required values of the given composite functions follow as:

(a) fog(x) = 4x², (b) gof(x) = 2x², and (c) gog(x) = x⁴.

Composite functions are mathematical functions that are formed by taking the output of one function and using it as the input for another function.

(a) To find fog(x), we need to evaluate g(f(x)).

Since function f(x) = 2x, we have:

g(f(x)) = g(2x) = (2x)² = 4x²

Therefore, fog(x) = 4x².

(b) To find gof(x), we need to evaluate f(g(x)).

Since g(x) = x², we have:

f(g(x)) = f(x²) = 2(x²) = 2x²

Therefore, gof(x) = 2x².

(c) To find gog(x), we need to evaluate g(g(x)).

Since function g(x) = x², we have:

g(g(x)) = g(x²) = (x²)² = x⁴

Therefore, gog(x) = x⁴.

Thus, the required values of the given composite functions follow as:

(a) fog(x) = 4x², (b) gof(x) = 2x², and (c) gog(x) = x⁴.

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The number of people in Indiana residents is given by the equation

A = 5,750,000 or 5.75 million

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the number of people in Indiana residents aged 5 years and older be A

Now , the equation will be

Substituting the values in the equation , we get

The percentage of population residents aged 5 years and older = 5.6 %

The number of residents aged 5 years and older = 322,000

So , the total population A is calculated as

( 5.6 % ) of A = 322,000

On simplifying the equation , we get

( 5.6 / 100 ) A = 322,000

Divide by 6.6 on both sides of the equation , we get

A / 100 = 57,500

Multiply by 100 on both sides of the equation , we get

A = 5,750,000

A = 5.75 million

Hence , the population of Indiana is A = 5,750,000 or 5.75 million

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Let V be an inner product space, S and S0 be subsets of V, and W be a finite-dimensional subspace of V. To prove the other side,

1 ) Suppose (e1,…,en) is basis for W. Suppose x∈(W⊥)⊥. Consider the projection w of x onto W, specifically:

w=⟨x,e1⟩e1+…+⟨x,en⟩en∈W.

Then, x−w is perpendicular to each ei, since

⟨x−w,ei⟩=⟨x,ei⟩−∑j=1n⟨⟨x,ej⟩ej,ei⟩=⟨x,ei⟩−∑j=1n⟨x,ej⟩⟨ej,ei⟩=⟨x,ei⟩−∑j=1n⟨x,ej⟩δij=⟨x,ei⟩−⟨x,ei⟩=0.

Since the linear map ⟨⋅,x−w⟩ is constantly 0 on the basis of W, it is constantly zero on all of W, hence x−w∈W⊥.

But then, since x∈(W⊥)⊥, we have ⟨x−w,x⟩=0, and since ⟨x−w,w⟩=0,

∥x−w∥2=⟨x,x−w⟩−⟨w,x−w⟩=0,

i.e. x=w∈W, completing the proof.

2 ) Suppose that w∈(W⊥)⊥

then ⟨w,x⟩=0

for all x∈W⊥

If w∉W, then w=v+v′ where v∈W and v′∈W⊥∖{0}.

Then.

0=⟨w,x⟩=⟨v,x⟩+⟨v′,x⟩=⟨v′,x⟩

for all x∈W⊥.

However, v′∈W⊥ and ⟨v′,v′⟩≠0 so it is a contradiction.

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In this matrix question where percentages are listed, answers to all these questions are written below.

In the matrix given in the image, we can calculate following things:

a. S32 is a value that represents the percentage of sick students in the third grade of the elementary school. From data we can say it is 10%

b. P22 is a value that represents the number of middle school students in the second grade. From data we can say there are 795 such boys.

c. To find[tex][s] * [p][/tex] we need to multiply the percentage of students in each category by the corresponding population in each grade level.

      [tex]\left[\begin{array}{ccc}1190.75&1311.75\\1194&1366.25\\1233&1405.5\end{array}\right][/tex]

Columns: Girls, Boys

Rows: Susceptible, Sick, Infected

d. [tex][[s] * [p]]21[/tex] represents the number of sick students in the second grade of the elementary school.

It represents that 1194 girls are sick.

e. To find the number of sick girls, we need to multiply the number of girls in each grade level by the corresponding percentage of sick students.

1194

f. To find the number of infected boys, we need to multiply the number of boys in each grade level by the corresponding percentage of infected students.

1406

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Complete Question: Image is uploaded for it.

a. Describe what S32 value is and what it will represent

b. Describe what P22 value is and what it will represent

c. Find [tex][s] * [p][/tex]

d. Describe what[tex][[s] * [p]]21[/tex] value is and what it will represent

e. How many sick girls are present?

f. Number of boys infected?

Using simple division we know that 86 people or citizens dies each day in 2015.

One of the four fundamental arithmetic operations, or how numbers are combined to create new numbers, is division.

The other operations are multiplication, addition, and subtraction.

Division in mathematics is the process of dividing an amount into equal parts.

For instance, we may split a group of 20 people into four groups of 5, five groups of 4, and so on.

So, we know that:

31,500 people died in 2015.

We also know that 2015 had 365 days.

Then, people died easily day would be:

= 31,500/365

= 86.30

Rounding off: 86 people

Therefore, using simple division we know that 86 people or citizens dies each day in 2015.

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The required length of the third side of the right-angle triangle is 15 units.

In a right-angled triangle, its sides, such as the hypotenuse, are perpendicular and the base is Pythagorean triplets.

Here,
For the right triangle lenght of the two legs to be 9 and 12 units, a measure of the third side is to be determined.

So, Applying the Pythagoras theorem,
h² = p² + b²
h = √9² + 12²
h = √225
h = 15

Thus, the required length of the third side of the right-angle triangle is 15 units.

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The percentages of the weights are given as follows:

a) Over 15.5 pounds: 2.07%.

b) Under 11.9 pounds: 75.8%.

c) Between 11.9 pounds and 15.9 pounds: 22.13%.

The z-score of a measure X of a variable that has mean symbolized by [tex]\mu[/tex] and standard deviation symbolized by [tex]\sigma[/tex] is obtained by the rule presented as follows:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The parameters for this problem are given as follows:

[tex]\mu = 10, \sigma = 2.7[/tex]

The proportion over 15.5 pounds is one subtracted by the p-value of Z when X = 15.5, hence:

Z = (15.5 - 10)/2.7

Z = 2.04

Z = 2.04 has a p-value of 0.9793.

1 - 0.9793 = 0.0207.

The proportion under 11.9 pounds is the p-value of Z when X = 11.9, hence:

Z = (11.9 - 10)/2.7

Z = 0.7

Z = 0.7 has a p-value of 0.7580.

The proportion between is the subtraction of the p-values, hence:

0.9793 - 0.7580 = 0.2213 = 22.13%.

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37.96 is the average atomic mass of the element in the data table .

What does average mean?

The average is calculated by dividing the total number of values by the total number of values. It can also be described as mean. The mean in statistics is the average value across the specified sample or data set.

                                      Mean, median, and mode are the three primary categories of average. Each of these methods operates a little bit differently and frequently yields values that diverge a little bit from the norm. The most popular type of average is the mean.

the average atomic mass = 35.97 + 37.96 + 39.96/3

                                          = 113.89/3

                                           =  37.96

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Answer:

39.96

Step-by-step explanation: I think

Answer:

$72

Step-by-step explanation:

300

4% per year

so 12$ per year,

6 years = 12*6 = 72

A phase change occurs when the kinetic energy decrease enough so that the attraction between molecules pulls them together.

A substance with weaker molecular attraction will freeze at a lower temperature because it requires more energy to be taken out before the attraction pulls the molecules together.

A substance with stronger molecular attraction will evaporate at a higher temperature because it requires less energy to be added to overcome attraction between the molecules.

In Science, a phase change refers to the change in the state of matter of a given chemical compound or substance. Additionally, some examples of a phase change include the following;

Generally speaking, a change in the state (phase) of matter that results in the release of energy is known as an exothermic reaction and they include:

In conclusion, sublimation, melting, and evaporation are other processes that are associated with a change in the state (phase) of matter.

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The amount of sand needed for every 100 square yard of surface would be 1. 1 cubic yards.

The amount of sand needed for 280 square yards would be 4 .18 cubic yards of sand.

The question says that 1. 1 cubic yards of sand are needed for every 100 square yards of surface so this is the amount of sand needed per 100 square yards.

As for 380 square yards, the amount of sand needed can be found by the formula :

= ( 380 square yards of surface x 1. 1 cubic yards of sand ) / 100 square yards of surface

= 418 / 100

= 4 .18 cubic yards of sand

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Statistics is a discipline, principally within applied mathematics, concerned with the systematic study of the collection, presentation, analysis, and interpretation of data.

The measures used in statistics are mean, range, standard deviation, variance etc.

The range can be calculated by finding the difference between the lowest and highest observation i.e. 23 - 12 = 11.

Variance is a measure of dispersion of data points from the mean. In the above given data, the variance is 9.389.

Standard deviation is the square root of the variance, hence, is 3.06.

Mean = sum of data divided by no of observations (10).

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The correct option that can be used to prove that ∠ABC = ∠FDE is option (A). It is done using rules of congruency.

What is meant by congruency?

In geometry, two figures or objects are said to be congruent if their shapes and sizes match, or if one is the mirror image of the other.

For the construction of the congruent angle, the compass measurement used is the same for both figures.

Now we draw a line through points A and C and another line through points F and E.

We can then say that

AB = FD

BC = DE

CA = EF

These are the sides of the triangles ΔABC and ΔFDE

As all sides are equal, we can say that

ΔABC ≅ ΔFDE by SSS congruency rule.

Now CPCTC rule says that "corresponding parts of congruent triangles are congruent". This means that the corresponding angles and sides of two or more triangles must also be identical in order for them to be considered congruent.

So ∠ABC ≅ ∠FDE by CPCTC as they are corresponding angles.

Therefore the correct congruency rules that can be used to prove that

∠ABC = ∠FDE is option (A).

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The intersection in the below problem is 13

Given equation is

[1,13] ∩ [13,19]

We need to simplify the expression and tell the intersection of the expression

After doing the intersection, we will  take all the common elements in two sets

so , we have

[1,13] ∩ [13,9 ] = 13

therefore we get the intersection of the given expression by simplifying it as 13.

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Well, most books define critical values of a function as x-values where f'(x)=0 or f'(x) is undefined, so they occur there because that's the definition of what a critical value is.

But the reason we define it that way is that when you're looking for local extrema (local mins and/or local maxs), these must occur when f'(x)=0 or f'(x) is undefined.  

If f has a local extremum at a point x=c, then f'(c)=0 or f'(c) is undefined.

Answer:

A regular prism with 10 faces and 12 vertices has 6 sides. This is because the number of faces and vertices are related by the equation F+2 = E+2V, where F is the number of faces, E is the number of edges, and V is the number of vertices. In this case, 10+2 = 12+2V, so V = 6 and the number of sides of the prism is also 6

Step-by-step explanation:

1. A regular prism has 10 faces and 12 vertices.

2. The number of faces and vertices is related by the equation F+2 = E+2V.

3. Where F is the number of faces, E is the number of edges, and V is the number of vertices.

4. In this case, 10+2 = 12+2V, so V = 6.

5. Therefore, the number of sides of the prism is also 6.

Answer:

6 GB

Step-by-step explanation:

First find the rate per day. You can do that by dividing 4GB by 20 days.

4/20 = 1/5 = 0.2GB per day

Then, just multiply 30 days by the rate of 0.2GB/day.

30 x 0.2 = 6

The statement of statistics "the statistical methods of analysis of variance assume that the populations are normally distributed" is true. So the correct answer is (a)True.

Statistics is a branch of applied mathematics that involves collecting, describing, analyzing, and drawing conclusions from quantitative data. It  gives us information to figure out how things work. Statistics are used to conduct research, evaluate results, develop critical thinking, and make informed decisions. Statistics can be used to examine nearly any area of ​​research to find out when and why things happen, and whether their recurrence is predictable. 

Statistics are used in many different applications and professions. Statistics are generated each time data is collected and analyzed. This ranges from government agencies to academic research to investment analysis. 

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Answer:

The cost of 3 tennis balls and 2 golf balls is $7. The cost of 6 tennis balls and 3 golf balls is$12. Find the cost of 1 tennis ball and 1 golf ball.

Step-by-step explanation:

The derivative of the given function is  23t^22 ln |t| +  t^22

What is an expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a complete sentence. Any one of the following mathematical operations can be used. A sentence has the following structure: Number/variable, Math Operator, Number/Variable is an expression.

The product rule  will be most helpful in beginning this problem.

S = t^23 ln|t|

Differentiate with respect to t

D(s) = ds/dt = D( t^23 ln|t| )

Apply the rule :

D(uv) = u'v+uv'

u' =du/dt , v'=dv/dt

D(s) = 23t^22 ln |t| +  t^23 (1/t)

D(s) = 23t^22 ln |t| +  t^22

The derivative of the given function is  23t^22 ln |t| +  t^22

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The derivative of the given function is  23t²² ln |t| +  t²².

What is an expression?

Mathematical expressions consist of at least two numbers or variables, at least one arithmetic operation, and a complete sentence. Any one of the following mathematical operations can be used. A sentence has the following structure: Number/variable, Math Operator, Number/Variable is an expression.

The product rule will be most helpful in beginning this problem.

S = t²³ ln |t|

Differentiate with respect to t

D(s) = ds/dt = D( t²³ln|t| )

Apply the rule :

D(uv) = u'v+uv'

u' =du/dt , v'=dv/dt

D(s) = 23t²² ln |t| +  t²³ (1/t)

D(s) = 23t²² ln |t| +  t²²

The derivative of the given function is  23t²² ln |t| +  t²²

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The average daily balance of the credit card for the January 1 - January 31 billing period is $1283.87.

In maths, the average value in a set of numbers is the middle value, calculated by dividing the total of all the values by the number of values. When we need to find the average of a set of data, we add up all the values and then divide this total by the number of values.

The average daily balance can be determined by dividing the total daily balances for January by the number of days in January.

The average daily balance = Total balance / Total number of days in January.

Total balance = (800 x 1 days) + (1000 x10 days) + (1250 x 10 days) + (1650 x 10 days)

Total balance = 800 + 10,000 + 12,500 + 16,500 = 39800

The average daily balance = 39800/31 = $1283.87

Therefore, the average daily balance of the credit card for the January 1 - January 31 billing period is $1283.87.

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