How to solve and answer

How To Solve And Answer

Answers

Answer 1

Answer:

option A

Step-by-step explanation:

2x*(x + 3) = 6x + 4

2x *x + 2x*3 = 6x + 4   {Distributive property}

2x² + 6x  = 6x + 4

Subtract 6x from both sides  {Subtraction property of equality}

2x² = 4

Divide both sides by 2 {Division property of equality}

x² = 4/2

x² = 2

x = √4     {Square root property}

x = ± 2


Related Questions

La temperatura exterior era de 8 grados a la medianoche. La temperatura bajó 5 grados durante cada una de las siguientes 3 horas. ¿Cuál era la temperatura a las 3 a.m.?​

Answers

Answer:

A las 3 AM la temperatura era de -7 grados.

Step-by-step explanation:

Dado que la temperatura exterior era de 8 grados a la medianoche, y la temperatura bajó 5 grados durante cada una de las siguientes 3 horas, para determinar cuál era la temperatura a las 3 a.m. se debe realizar el siguiente cálculo:

8 - (3 x 5) = X

8 - 15 = X

-7 = X

Por lo tanto, a las 3 AM la temperatura era de -7 grados.

A,B and C are the vertices of a triangle,
A has coordinates (4,6)
B has coordinates (2,-2)
C has coordinates (-2,-4)
D is the midpoint of AB.
E is the midpoint of AC.
prove that DE is parallel to BC.

Answers

SSS (side, side, side)

Answer:

SSS (side, side, side)

hope it helps:))!!!

Calculate the mean and median of the list of numbers below: 3, 5, 2, 10, 6, 3, 7, 3

Answers

Answer:

Step-by-step explanation:

mean = sum of data / no of data

=3 + 5 + 2 + 10 + 6 + 3 + 7 + 3/8

=36/8

4.5

to calculate the given data must be arranged in ascending to descending order . So , the data are

2 , 3 , 3 , 3 , 5 , 6 , 7 , 10

Median = N + 1/2    (N means no of data)

=8 + 1/2

=9/2

=4.5

=(4 + 5) th term / 2

=3 + 5/2

=8/2

=4

From the information given, (a) construct the indicated sample space and (b) answer the probability question.
a. A couple planning to have three children.
b. Find the probability of having exactly one girl.

Answers

Answer:

(a) 3 (b) 1/3

Step-by-step explanation:

The probability is defined as the ratio  of number of elements in event to the number of elements in sample space.

(a) As the total number of child is 3, so the number of elements in sample space = 3

(b) The sample space is { boy, boy, girl}

So, the probability is 1/3.  

Explain why the square root of a number is defined to be equal to that number to the 1/2 power

Answers

9514 1404 393

Answer:

  (x^(1/2))(x^(1/2)) = x^(1/2 +1/2) = x^1 = x

Step-by-step explanation:

The rule of exponents is ...

  (x^a)(x^b) = x^(a+b)

From which ...

  (x^a)(x^a) = x^(a+a) = x^(2a)

So, if we want two identical factors that have a product of x = x^1, then the exponents of those factors will be such that ...

  x^(2a) = x^1

  2a = 1

  a = 1/2

The square root is defined as one of two identical factors that have a product equal to the specified value. That is ...

  (√x)(√x) = x

Above, we have shown that ...

  (x^(1/2))(x^(1/2)) = x

so, we can conclude ...

  √x = x^(1/2)

_____

Additional comment

In like fashion, we can show that the n-th root of a number is the same as that number to the 1/n power. It's really a matter of definition. Since the square of x^(1/2) is x, we call x^(1/2) the square root. It is used commonly enough that it has its own symbol: √x.

Answer:

Squaring and square root are inverses, so one should "undo" the other. That is, squaring the square root of a number results in the number. Using the power of a power rule, you multiply the exponents. Since a number to the first power is itself, the product of the exponents must equal 1. This means that the power of the square root must be the reciprocal of 2, or one half.

Step-by-step explanation:

In a Louisiana chili cook-off, 18 of the 40 chilis included two types of beans.

A photo of multiple crock pots on a long table is shown. The caption says chili cook-off.

What percentage of the chilis did not include two types of beans?

Enter the correct answer in the box.


Answers

Answer:

55%

Step-by-step explanation:

18 out of 40 include chili.

So 22 has no chili

22/40 = 0.55 or 55%

square the following numbers
5, 9, 12​

Answers

Answer:

5² = 25

9² = 81

12² = 144

hope it helps

have a nice day

Answer:

5^2=5x5=25

9^2=9x9=81

12^2=12x12=144

Step-by-step explanation:

If this helps you, please mark brainliest!

Have a nice day!

Student researchers investigated whether balsa wood is less elastic after it has been immersed in water. They took 60 pieces of balsa wood and randomly assigned half to be immersed in water and the other half not to be. They measured the elasticity by seeing how far (in inches) the piece of wood would project a dime into the air.

Required:
​Does the p-value obtained using the theory-based method (p < 0.0001) agree with that obtained using the randomization/simulation-based method (p < 0.0001)?

Answers

i actually dont know this

Yes, they are quite similar. the p-value obtained using the theory-based method (p < 0.0001) agree with that obtained using the randomization/simulation - based method (p < 0.0001)

P- value is the probability of obtaining a value of test statistic more extreme in the direction of alternative hypothesis than the observed one. In easy words if p -value < level of significance we reject H0 in favor of H1.

Here:

p-value < 0.0001 => we reject H0.

If the statistical software renders a p value of 0.000 it means that the value is very low, with many "0" before any other digit.

So the interpretation would be that the results are significant, same as in the case of other values below the selected threshold for significance.

Therefore, yes they are quite similar.

Learn more about balsa wood here:

https://brainly.com/question/33256379

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Incomplete Question:

Student researchers investigated whether balsa wood is less elastic after it has been immersed in water. They took 60 pieces of balsa wood and randomly assigned half to be immersed in water and the other half not to be. They measured the elasticity by seeing how far (in inches) the piece of wood would project a dime into the air.

Does the p-value obtained using the theory-based method (p < 0.0001) agree with that obtained using the randomization/simulation-based method (p < 0.0001)?

A. No, they are different.

B. Yes, they are quite similar.

given f(x) = 5x + 7,g(x) = 3x-1 find f(g(x))

Answers

Answer:

f(g(x)) = 15x + 2

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Distributive Property

Algebra I

FunctionsFunction NotationComposite Functions

Step-by-step explanation:

Step 1: Define

Identify

f(x) = 5x + 7

g(x) = 3x - 1

Step 2: Find

Substitute in functions:                                                                                    f(g(x)) = 5(3x - 1) + 7[Distributive Property] Distribute 5:                                                                 f(g(x)) = 15x - 5 + 7[Addition] Combine like terms:                                                                        f(g(x)) = 15x + 2

can someone tell me what the diffrence of 8 through 5 is

Answers

Answer:

The answer is 3.

Step-by-step explanation:

What is the difference between 8 and 5? In mathematics, the difference between two numbers usually means to subtract them. So if you want to find the difference, you take the bigger one minus the smaller one. So, the difference between 8 and 5 is 3.

Answer:

3

Step-by-step explanation:

What is the difference between 8 and 5? In mathematics, the difference between two numbers usually means to subtract them. So if you want to find the difference, you take the bigger one minus the smaller one. So, the difference between 8 and 5 is 3.

Answer fast please and thank you!

Answers

Step-by-step explanation:

everything can be found in the picture

474 ( ) 548 42. - 8 how do I arrive at this answer.

Answers

9514 1404 393

Answer:

  (64x^28)/(5y^22)

Step-by-step explanation:

The applicable rules of exponents are ...

  (a^b)^c = a^(bc)

  (a^b)(a^c) = a^(b+c)

  (a^b)/(a^c) = a^(b-c)

__

First, eliminate the outside exponent on the left factor. Then use the above rules to combine factors with the same base.

  [tex]\displaystyle\left(\frac{4x^4}{5y^6}\right)^5\cdot\left(\frac{5^4y^8}{4^2x^{-8}}\right)=\frac{(4^5x^{20})(5^4y^8)}{(5^5y^{30})(4^2x^{-8})}=4^{5-2}5^{4-5}x^{20-(-8)}y^{8-30}\\\\=4^35^{-1}x^{28}y^{-22}=\boxed{\frac{64x^{28}}{5y^{22}}}[/tex]

work out the value of 6.8x10^2 x 1.3x10^-3

Answers

Answer:

0.884

Step-by-step explanation:

just use a calculator

Please help, What equation is always true?

Answers

Answer:

4. m<7 = m<3 + m<2

Step-by-step explanation:

Recall: the exterior angle theorem of a triangle states that an exterior angle is equal to the sum of the two opposite interior angles of a triangle.

❌Option 1 CANNOT be true

Rationale:

m<1 is an exterior angle of triangle ∆ABC and ∆EBC, so based on the exterior angle theorem of a triangle, m<1 = m<3 + m<4 or m<1 = m<ABC + m<5

❌Option 2 CANNOT be true.

Rationale:

m<5 ≠ m<3 - m<2

❌Option 3 CANNOT be true.

Rationale:

m<6 ≠ m<3 - m<2

✅Option 4 is CORRECT.

Rationale:

Based on the external angle theorem of a triangle,

m<7 = m<3 + m<2

A plane flies 420 miles with the wind and 350 miles against the wind in the same length of time. If the speed of the wind is 15 ​mph, find the speed of the plane in still air.

Answers

Answer:

161 speed of plain in still air

Mark in brainlist

Choose the correct option
Write down the inequality shown in the diagram
-4 < x <3
Option 1
-4 < x <3

Answers

Answer:

-4 < x <3

Option 1

-4 < x <3

-

There are twelve empty rooms in the office of Acme Softwares, inc. Alif and Laila joins the company. How many ways can they be assigned a room each from these twelve

Answers

Answer:

132.

Step-by-step explanation:

That would be the number of permutations of 2 from 12.

12P2 = 12! / (12-2)!

= 132.

Find the measure of the missing angle.

Answers

Answer:

92

Step-by-step explanation:

The angles are vertical angles and vertical angles are equal

? = 92

Answer:

92 degrees

Step-by-step explanation:

the 92 degree angle is congruent to the missing angle

can anyone please help me with this?

Answers

Answer:

I believe that It would be b

A researcher investigated whether following a vegetarian diet could help to reduce blood pressure. For a sample of 85 people who followed a vegetarian diet for 4 months, the mean systolic blood pressure was 124 mmHg. For a sample of 75 people who followed a non-vegetarian diet for 4 months, the mean systolic blood pressure was 138 mmHg. Methods of statistics show that if a vegetarian diet had no effect on blood pressure, there would be less than 1 chance in 100 of getting these results. Does the result have statistical significance? Why or why not? Does the result have practical significance?

Answers

Answer:

Yes, the result does not have statistical significance

Yes, the result has practical significance

Step-by-step explanation:

An experiment or claim may be said to be statistically significant if it's occurence is likely not due to chance for a certain level of stated significance. From the scenario described, it is stated that if vegetarian diet has no effect on blood, then the result obtained wipukd likely occur in less Than 1 of 100 ; this is < 0.01. This means that the effect of vegetarian diet on blood could not have occurred by chance. Hence, result is statistically significant.

The result does have practical significance too, since there is a distinctive difference in blood pressure of non - vegetarians(138mmHg) and Vegetarians (124mmHg).

The strongest winds of Hurricane Isabel extended 50 miles in all directions from the center.
What is the area of the hurricane in square miles? Leave your answer in terms of Pi

Answers

Answer:

20

Step-by-step explanation:

your mom

Solve mentally. See the image below.

Answers

37.5% of 20 is 7.5 so the answer is 37.5%

Answer:

7.5 is 37.5% of 20.

Step-by-step explanation:

Solve for %

We know that ; % = given no. ÷ total no. × 100

Where, we've

Given number = 7.5and Total number = 20

plug the values

[tex] \small \sf \frac{7.5}{20} \times 100 \\ [/tex]

canceling 100 by 20 to get

7.5 × 5

multiply the numbers

37. 5 %

GIVEN a = (2 -3) and b = (1 -5 ) find 3a - b

Answers

Answer:

3a - b = 1

Step-by-step explanation:

a = (2-3)

b = (1-5)

Substitute the values of a and b to the 3a-b.

3(2-3) - (1-5)

6-9 - (-4)

6 - 9 + 4

-3 + 4

= 1

Therefore, 1 is the answer.

Step-by-step explanation:

Solution :

Given,

a= (2 - 3)

b= (1 - 5)

Now,

3a-b

= 3(2 - 3) -(1 - 5)

= 3×(-1) - (-4)

= -3+4

= 1

.

. .The value of 3a-b is 1

An analyst must decide between two different forecasting techniques for weekly sales of roller blades: a linear trend equation and the naive approach. The linear trend equation is Ft = 124 + 2t, and it was developed using data from periods 1 through 10.
t units sold
11 147
12 148
13 151
14 145
15 155
16 152
17 155
18 157
19 160
20 165
Based on data for periods 11 through 20 as shown in the table, which of these two methods has the greater accuracy if MAD and MSE are used? (Round your answers to 2 decimal places.)
MAD (Naive)=
MAD (Linear)=
MSE (Naive)=
MAD (Linear)=

Answers

Answer:

Following are the responses to the given question:

Step-by-step explanation:

Mean Absolute Deviation MAD

[tex]MAD = \sum_{i=1}^{n} \frac{\left | actual_{i}-forecast_{i} \right |}{n}[/tex]

Mean squared error  

[tex]MSE=\Sigma^{n}_{i=1} \frac{(Actual_i - Forecast_i)^2}{(n - 1)}[/tex]

linear trend equation is [tex]Ft = 124 + 2t[/tex]

[tex]MAD = \frac{23}{10} = 2.3\\\\MSE = \frac{91}{9}= 10.11\\\\[/tex]

Naive method

[tex]MAD = \frac{36}{9} = 4\\\\MSE = \frac{202}{8}=25.25\\\\MAD (Naive) = 4\\\\MAD (Linear) =2.3\\\\MSE (Naive)=25.25\\\\MSE (Linear)=10.11\\\\[/tex]

Please find the attached file.

The probability distribution for a random variable x is given in the table X: -5,-3,-2,0,2,3 Probability: .17,.13,.33,.16,.11,.10 Find the probability that -2<_x<_2

Answers

Answer:

0.6 probability that [tex]-2 \leq x \leq 2[/tex]

Step-by-step explanation:

The probability distribution is given in the table.

Probability that x is between -2 and 2.

Between -2 and 2, inclusive, we have -2, 0 and 2. So

[tex]P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2)[/tex]

From the table:

[tex]P(X = -2) = 0.33, P(X = 0) = 0.16, P(X = 2) = 0.11[/tex]. So

[tex]P(-2 \leq x \leq 2) = P(X = -2) + P(X = 0) + P(X = 2) = 0.33 + 0.16 + 0.11 = 0.60[/tex]

0.6 probability that [tex]-2 \leq x \leq 2[/tex]

In psychology, aptitude tests are designed to measure the ability to learn. Questions are designed to be age appropriate so as not to be biased toward age due to knowledge acquired. In this study, an aptitude test is given on the skills necessary to use apps on a smart phone. An aptitude test with a maximum score of 150 is given to measure the ability to learn how to use apps on a smartphone.
The regression line for the predicted value of aptitude given age is as follows:
Aptitude = 111.3 - 1.13*Age
Find the expected aptitude test score for a person whose age is 15 years. Your answer should be rounded to the nearest whole number.

Answers

Answer:

The expected aptitude test score for a person whose age is 15 years is 94.

Step-by-step explanation:

Aptitude formula in function of age:

The aptitude A in function of age a is given by:

[tex]A(a) = 111.3 - 1.13a[/tex]

Find the expected aptitude test score for a person whose age is 15 years.

This is A when a = 15. Thus, finding the numeric value of the function:

[tex]A(a) = 111.3 - 1.13a[/tex]

[tex]A(15) = 111.3 - 1.13(15) = 94.35[/tex]

Rounding to the nearest whole number, 94.

In this question, we first explain the expected aptitude test after that we calculate its value.

The test of aptitude allows employers to assess the skills of a candidate via a variety of test formats. Required to test your ability to do things and react to working circumstances is tested. It includes, among others, problem-solving, prioritization as well as numeracy skills.When a score of 100% again for a perfect aptitude test, as well as a score of 80% or greater is considered a good person with the minimum acceptable score is deemed to be between 70% and 80%.

Given:

[tex]\to \bold{Aptitude = 111.3 - 1.13*Age}[/tex]

[tex]\to \bold{Age= 15 \ years}\\\\[/tex]

Putting the age value into the Aptitude equation to calculate its value:

[tex]\bold{= 111.3 - 1.13*(15)}\\\\\bold{= 111.3 - 16.95}\\\\\bold{=94.35 \approx 94} \\\\[/tex]

Therefore, For a person 15 years of age 94, the anticipated test score for aptitude.

Learn more:

brainly.com/question/21264109

When the variable is on both sides of the inequality it must be isolated on one side and it doesn’t matter which side

Answers

Answer:

True

Step-by-step explanation:

Answer:

Isolate the variable and then use substitution to solve the system of equations.

Step-by-step explanation:

.

As percents of the whole, how big are the following?

Answers

Answer:

A= 1%

B=10%

C= 32%

Step-by-step explanation:

There are 100 total squares, which makes this easy because a percent is out of 100%. All you have to do is count the number of squares and put it out of 100

A random sample of 10 subjects have weights with a standard deviation of 12.7363 kg. What is the variance of their​ weights?

Answers

Answer:

Variance, V = 162.2133 kg²

Step-by-step explanation:

Given the following data;

Standard deviation = 12.7363 kg.

To find the the variance of their weights?

Mathematically, standard deviation is equal to the square root of variance.

[tex]Sd = \sqrt{V}[/tex]

Where;

Sd is the standard deviation of the sample.

V is the variance of the sample.

Substituting into the formula, we have;

[tex]12.7363 = \sqrt{V}[/tex]

Taking the square of both sides, we have;

[tex]12.7363^{2} = V [/tex]

Variance, V = 162.2133 kg²

What is MS Word?
O It is a computerized tool.
O It is a calculating tool
O It is a graphic design tool.
O Its is a typing tool.

Answers

The answer is a hope it helps
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