Let $x$ be the positive number such that $2x^2 = 4x + 9.$

If $x$ can be written in simplified form as $\dfrac{a + \sqrt{b}}{c}$ such that $a,$ $b,$ and $c$ are positive integers, what is $a + b + c$?

Answers

Answer 1

Solve for x. I'll do it by completing the square:

2x² = 4x + 9

2x² - 4x = 9

x² - 2x = 9/2

x² - 2x + 1 = 11/2

(x - 1)² = 11/2

x - 1 = ± √(11/2)

x = 1 ± √(11/2)

x = 1 ± √22/2

x = (2 ± √22)/2

Take the solution with the positive square root. Then it follows that a = c = 2 and b = 22. So a + b + c = 26.


Related Questions

In recent years, Sheffield Transportation purchased three used buses. Because of the frequent turnover in the accounting department, a different accountant was in charge of selecting the depreciation method for each bus, and various methods have been used. Information concerning the buses is summarized in the table below. Bus 1, Bus 2, Bus 3, For the declining-balance method, the company uses the declining method rate. For units-of-activity method, total miles are expected to be 125,000. Actual miles of use in the first 3 years were 2021, 27,000; 2022, 35,000; and 2023, 33,000.

(a1) For Bus #3, calculate depreciation expense per mile under units-of-activity method.

Answers

Under the units-of-activity method, the depreciation expense per mile for Bus #3 is $0.4616.

How is the depreciation expense per mile determined?

The units-of-activity method is one of the depreciation methods in use.

Under the units-of-activity method, the depreciation expense per unit is determined by dividing the depreciable amount by the total units of activity.

The depreciation amount (the value of the asset subject to depreciation) is the net of the total cost less the salvage value.

Depreciable amount of Bus #3 = $57,700 ($66,500 - $8,800)

Expected total miles for Bus #3 = 125,000

Depreciation expense per mile for Bus #3 = $0.4616 ($57,700 ÷ 125,000)

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Question Completion:

Bus    Acquired    Cost    Salvage    Useful Life     Depreciation
                                          Value         in Years          Method

1          1/1/12      $99,100   $7,900           4             Straight-line

2         1/1/12      128,000     11,000          4             Declining- balance

3         1/1/13       66,350      8,800          5             Unit-of-activity

Seven times the sum of a number and 1. and the number is x

Answers

The required number we're looking for is x = 3.

What is Sum?

The outcome or conclusion we arrive at when we add two or more integers is known as the SUM. Addends are the integers that are added. In the previous illustration, the total of the addends, 6, and 4, is 10. In other terms, we can say that 8 plus 5 equals 13 or that 8 plus 5 equals 13.

According to question:

We can start by translating the problem into an equation. Let x be the number we're trying to find. Then the problem can be expressed as:

\($$7(x+1) = 28$$\)

Simplifying the equation, we first distribute the 7 on the left-hand side:

7x + 7 = 28

Then we isolate the variable x by subtracting 7 from both sides:

7x = 21

Finally, we solve for x by dividing both sides by 7:

x = 3

Therefore, the number we're looking for is x = 3.

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Complete question:

Seven times the sum of a number and 1 is 28.

What is the number?

1
Determine the amplitude and the period of f(x) = sin 2x.
The amplitude is

212
1
2
Choose...

and the period is 1
22
2
Choose...

1Determine the amplitude and the period of f(x) = sin 2x.The amplitude is221212Choose...and the period

Answers

The amplitude of the function is 1/2, and the period of the function is π.

We know that,

The general form of a sine function is,

⇒ f(x) = A sin(Bx + C) + D,

where:

A is the amplitude

B is the angular frequency or 2π divided by the period

C is the horizontal shift

D is the vertical shift

Now, We have;

The function is,

⇒ f (x) = 1/2 sin 2x

Hence, By Comparing this to the function f(x) = 1/2 sin 2x, we can see that:

A = 1/2, which means that the amplitude of the function is 1/2.

B = 2, which means that the angular frequency is 2,

Or equivalently, the period of the function is 2π/2 = π.

Therefore, the amplitude of the function is 1/2, and the period of the function is π.

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WILL GIVE BRAINLIEST PLEASE HELP!

WILL GIVE BRAINLIEST PLEASE HELP!

Answers

The correct statement regarding the angle measures is given as follows:

m < 1 + m < 4 > m < 3.

How to obtain the angle measures?

The given angle measure is as follows:

m < 3 = 119º.

Angles 3 and 4 form a linear pair, meaning that they are supplementary, that is, the sum of their measures is of 180º.

Hence the measure of angle 4 is given as follows:

m < 4 + m < 3 = 180º.

m < 4 = 180º - 119º

m < 4 = 61º.

Angles 1 and 4 are opposite by the same vertex, hence they are congruent, thus the measure of angle 1 is given as follows:

m < 1 = m < 4

m < 1 = 61º.

Hence:

m < 1 + m < 4 = 2 x 61

m < 1 + m < 4 = 122º

122º > 119º

m < 1 + m < 4 > m < 3.

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Fill in the blanks.

1. The slopes of perpendicular lines are ______.
2. Parallel lines have the _____ slope.
3. The shortest distance from any point to a line is a ______.

Answers

1. The slopes of perpendicular lines are  a negative reciprocal

2. Parallel lines have the same slope.

3. The shortest distance from any point to a line is a straight line

What is the slope perpendicular lines?

The slope of two perpendicular lines is such that the slope of one line is equal to the reciprocal of the negative slope of the other.

if two lines of slope m and m' are perpendicular their slopes is written as

m = -1/m'

What is the slope parallel lines?

Parallel lines grow vertically and flow horizontally at the same rate. they have the same slope, they never cross.

if two lines of slope m and m' are perpendicular their slopes is written as

m = m'

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Tonya’s dog-walking service charges a flat rate of $20 per month, plus $3 per mile that each dog is walked. Beth does not charge a monthly fee for her dog-walking service, but she charges $5 per mile that each dog is walked. Write and solve an equation to find the number of miles m for which Tonya and Beth would charge the same amount.

Answers

Answer:

Ten miles

Step-by-step explanation:

Use this inequality

20 + 3m = 5m

The volume of a rectangular prism is 2 x cubed + 9 x squared minus 8 x minus 36 with height x + 2. Using synthetic division, what is the area of the base?

Answers

The base area of the prism is 2x² + 5x - 18

How to determine the area of the base?

From the question, the given parameters are

Volume = 2 x cubed + 9 x squared minus 8 x minus 36

Height =  x + 2

Rewrite properly as

Volume = 2x³ + 9x² - 8x - 36

Height =  x + 2

The base area is calculated as

Base area = Volume/Height

Using the synthetic division, we have

Set the divisor to 0

x + 2 = 0

This gives

x = -2

So, we have the representation to be

-2 | 2   9  - 8  - 36

Write out 2

So, we have

-2 | 2   9  - 8  - 36

     2

Multiply 2 and -2

This gives

-2 | 2   9  - 8  - 36

          -4

     2

So, we have

-2 | 2   9  - 8  - 36

          -4

     2    5

Repeat the process

So, we have

-2 | 2   9  - 8  - 36

          -4  -10

     2    5   -18

Repeat the process

So, we have

-2 | 2   9  - 8  - 36

          -4  -10   36

     2    5   -18    0

This means that

Base area = 2x² + 5x - 18

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These shapes are similar.
Find X.
5
X
5
30
24
30

Answers

The value of x is 4.

To determine the value of x, we can use the concept of similarity between shapes.

Similar shapes have corresponding sides that are proportional to each other.

Given the dimensions of the first shape as 5, x, and 5, and the dimensions of the second shape as 30, 24, and 30, we can set up the following proportion:

5/x = 30/24

To solve for x, we can cross-multiply:

30 · x = 5 · 24

30x = 120

Dividing both sides of the equation by 30:

x = 120 / 30

x = 4

Therefore, the value of x is 4.

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Using the present value approach, solve the following:

Tom has $100 in a bank account that pays a guaranteed 5% interest rate each year. How much would Tom have at the end of Year 3?

Answers

Answer:

Step-by-step explanation:

$100x0.5x1=$5

I need help with math ngl

I need help with math ngl

Answers

Answer:

Oldest to newest:

10^-35, 10 ^-10, 0

Step-by-step explanation:

Scientific notation

To figure out the power of 10 think "how many places do I move the decimal point?"

When the number is 10 or greater the decimal point moves to the left, and the power of 10 is positive.

When the number is smaller than 1 the decimal point moves to the right, so the power of 10 is negative.

Review the Strategies 5. Corey and his 2 friends earn $12 each for doing yard work. How much money will they get paid altogether if they work on 5 yards? Make a table. 3 friends x $12 a yard $36 a 1 yard 2 yards 3 yards | 4yards 15 yards $36

Review the Strategies 5. Corey and his 2 friends earn $12 each for doing yard work. How much money will

Answers

If the 3 friends work on 2 yards, then together they will earn:

\(3\text{friends}\cdot12\text{ dollars per yard}\cdot2yards=72\text{ dollars.}\)

If the 3 friends work on 3 yards, then together they will earn:

\(3\text{friends}\cdot12\text{ dollars per yard}\cdot3yards=108\text{ dollars.}\)

If the 3 friends work on 4 yards, then together they will earn:

\(3\text{friends}\cdot12\text{ dollars per yard}\cdot4yards=144\text{ dollars.}\)

If the 3 friends work on 5 yards, then together they will earn:

\(3\text{friends}\cdot12\text{ dollars per yard}\cdot5yards=180\text{ dollars.}\)

Answer:

Therefore, if the 3 friends work on 5 yards, then together they will earn $180.

Review the Strategies 5. Corey and his 2 friends earn $12 each for doing yard work. How much money will

Find w and y without a calculator, will give brainliest for the correct answer

Find w and y without a calculator, will give brainliest for the correct answer

Answers

Answer: w=4, y=4

Step-by-step explanation:

For this problem, we can use the 30-60-90 triangle to find out what the length of w and y are. 30-60-90 triangle is a special triangle. The hypotenuse is 2x in length. It is directly opposite the right angle. The leg opposite of 60° is x√3 in length. The leg opposite of 30° is x. For all 3 legs, wherever you see x, you plug in the same number.

We can look at the figure as 2 separate triangles.

For the triangle on the right, we can see the hypotenuse is 8. Since we know the length of the hypotenuse is 2x, we can plug in 8 for 2x to find x.

2x=8

x=4

Now that we know x=4, we can directly plug it into the lengths above.

W is across from 30°. Above, we have established that the leg across from 30° has the length of x. Since x=4, w=4.

Since w=4, we can use this information to find the length of y by looking on the left triangle. Now, y is across from 30°. In the first paragraph, we stated that the leg across from 30° is x. Since we know x, we can directly plug it into this. After we plug it in, y=4.

What is 381 1/10 - 214 43/100 = help me please !!!

Answers

Answer :




166.67 fractions

The answer to the expression is  \(166\frac{67}{100}\)

First, you must turn the mixed numbers into improper fractions.

\(\frac{3811}{10} -\frac{21443}{100}\)

Then, you must find like denominators.

\(\frac{38110}{100} -\frac{21443}{100}\)

Next, subtract the numerators of the fractions.

\(38110-21443=16667\)

\(\frac{16667}{100}\)

Finally, convert the improper fraction into a mixed number.

\(166\frac{67}{100}\)

can someone please help me

can someone please help me

Answers

Answer:

B and F should be right since the angle in the middle of them anchors in the the middle of the circle

A quadrilateral is shown.
H
6.5
5.51
What is the area of the quadrilateral? Enter the answer in the box.

Answers

The calculated area of the quadrilateral is 35.82 square units.

What is the area of the quadrilateral?

Given that

BAse = 6.5

Height = 5.51

To find the area of a quadrilateral, we need to multiply the base by the height.

Area of quadrilateral = base x height

Substituting the given values, we get:

Area = 6.5 x 5.51

Area = 35.815

Rounding to the nearest hundredth, the area of the quadrilateral is 35.82 square units.

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A, B, and C are collinear points C is the midpoint of AB AC = 5x - 6 CB = 2x Find AB

Answers

Answer:

  AB = 8

Step-by-step explanation:

Since C is the midpoint, ...

  AC = CB

  5x -6 = 2x

  3x = 6 . . . . . . . add 6-2x

  x = 2

Then the length of AB is ...

  AB = 2(CB) = 2(2x) = 4(2)

  AB = 8

What is the range of f(x) = -62*?
O A. y< 1
OB. y<0
O C. y> 0
O D. All real numbers

Answers

Answer:

D. all real numbers

Step-by-step explanation:

i think this is the answer sorry if you get it wrong.

hey can you help me with this question

Answers

where the question??????????????

Hannah says that 1/8

is not on this number line and cannot be plotted. Write an note to Hannah about her misunderstanding.

Hannah says that 1/8 is not on this number line and cannot be plotted. Write an note to Hannah about

Answers

Answer:This number line represents all number. Although 1

8

is not labeled, it still exists on the number line and can be plotted. 1

8

is located halfway between 0 and 1

4

hope this help!

Solve for x: 4(x + 2) = 3(x − 2)

Answers

Answer:

\(\huge\boxed{\sf x = -14}\)

Step-by-step explanation:

Given equation:

4(x + 2) = 3(x - 2)

Distribute

4x + 8 = 3x - 6

Subtract 3x from both sides

4x - 3x + 8 = -6

x + 8 = -6

Subtract 8 from both sides

x = -6 - 8

x = -14

\(\rule[225]{225}{2}\)

Compute the value of the discriminant and give the number of real solutions of the quadratic equation. 2 -25x + 20x -4=0​

Answers

your answer is x = -2/5

please help need this for my homework!!!

please help need this for my homework!!!

Answers

Two triangles are congruent if they meet one of the following criteria. : All three pairs of corresponding sides are equal. : Two pairs of corresponding sides and the corresponding angles between them are equal. : Two pairs of corresponding angles and the corresponding sides between them are equal.

1.
Which of the systems of equations has a solution of (-2, 6)?

1.Which of the systems of equations has a solution of (-2, 6)?

Answers

Answer:

It is Option D

Step-by-step explanation:

-2 + 12 = 10

and

8 - 6 = 2

Given MB = PB and m arc PB = 27°, find the m∠PBM

Given MB = PB and m arc PB = 27, find the mPBM

Answers

The measure of the angle m∠PBM is calculated as; 54°

How to find the measure of the interior angle of an arc?

An inscribed angle is defined as an angle with its vertex on the circle.

The measure of an inscribed angle is half the measure the intercepted arc.

The formula is:

Measure of inscribed angle = 1/2 × measure of intercepted arc

Now, we are given that;

MB = PB

Arc PB = 27°

Thus;

Arc MBP = 2 * 27°

Arc MBP = 54°

Thus, using the Measure of inscribed angle we have;

∠PBM = 27 * 2 = 54°

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Please answer if you are SURE.

Please answer if you are SURE.

Answers

Answer Step-by-step explanation:

2x-7

-14

3x

2+7

Given the function below, evaluate h(2) for x = -2
h(x) = -4x2 + x +1

Answers

The answer will be -13. Hope this helps!!
Given the function below, evaluate h(2) for x = -2h(x) = -4x2 + x +1

which of these is an example of typing at an average of 42 words per minute

Answers

There aren’t any options but maybe 42m where m represents the minutes. So for every minute it will be multiplied by 42

A vending machine automatically pours soft drinks into cups. The amount of soft drink dispensed into a cup is normally distributed with a mean of 7.5 ounces and standard deviation of 0.5 ounces. Examine the figure below and answer the following questions.



a.) Estimate the probability that the machine will overflow an 8-ounce cup. (Round your answer to two decimal places.)



b.) Estimate the probability that the machine will not overflow an 8-ounce cup. (Round your answer to two decimal places.)



c.) The machine has just been loaded with 300 cups. How many of these do you expect will overflow when served?

A vending machine automatically pours soft drinks into cups. The amount of soft drink dispensed into

Answers

The machine has just been loaded with 850 cups. How many of these do you expect will overflow when served?

0.1587*850 = 134.857..

How to solve

A vending machine automatically pours soft drinks into cups.

The amount of soft drink dispensed into a cup is normally distributed with a mean of 7.6oz and a standard deviation of 0.4oz.

Examine figure 7.- and answer the following questions.

a) estimate the probability that the machine will overflow an 8oz cup.

Procedure:

Determine the z-score for 8

z(8) = (8-7.6)/0.4 = 0.4/0.4 = 1

P(x>8) = P(z>1) = 0.1587..

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

b) Estimate the probability that the machine will not overflow an 8oz cup.

P(z<1) = 1 - 0.1587 = 0.8413..

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

c) the machine has just been loaded with 850 cups. How many of these do you expect will overflow when served?

0.1587*850 = 134.857..; Rounded down you get 134 cups

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2. Troy had 3/8 of a pizza left over from his party. He ate 3/4 of the leftover pizza for breakfast. How much of the
whole pizza did Troy have at breakfast?


3. 3/5 of a bag of coffee weighs 6/7 pound. How much does a whole bag of coffee weigh?

Answers

The 9/32 of whole pizza Troy had for breakfast. The whole bag of coffee weighs 10/7 pounds

A fraction is defined as a part of a whole quantity.

1. Leftover pizza = 3/8

Pizza used as breakfast = 3/4 of left-over pizza

= 3/4 of 3/8

The of is calculated by the use of multiplication

The fractions are multiplied as follows:

The numerators of the fractions are multiplied and written as the numerator.The product of the denominators is written as the denominator.Then we simplify the given fraction to get the final result.

Pizza used as breakfast = 3/4 * 3/8

= 3 * 3 / 4 * 8

= 9/32

2. 3/5 of bag of coffee weighs = 6/7 pounds

1 bag of coffee weighs = 6/7 ÷ 3/5

The fractions are divided as follows:

The fraction to be divided is reciprocatedThe numerators of the fractions are multiplied and written as the numerator.The product of the denominators is written as the denominator.Then we simplify the given fraction to get the final result.

Thus, = 6/7 * 5/3

= 6 * 5 / 7 * 3

= 30/21

= 10/7 pounds

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How many 3/16-yard pies can be cut from 3/4 yard of ribbion?

Answers

The number of 3 / 16 yards pieces that can be cut from 3 / 4 yard of ribbon is 4.

How to find how many pieces of ribbon that can be cut?

The actual length of the ribbon is 3 / 4 yards.

He wants to cut 3 / 16 yards pieces from the actual length of the ribbon.

Therefore, the number of 3 / 16 yard that can be cut from 3 / 4 yard of ribbon can be calculated as follows;

number of pieces of ribbon = 3 / 4 ÷ 3 / 16

number of pieces of ribbon = 3 / 4 × 16 / 3

number of pieces of ribbon =  48 / 12

Therefore,

number of pieces of ribbon =  4 yards

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Die Schweiz hat 7,35 Mio, Einwohner und liegt zu groen Teilen in den Alpen, zwischen Deutschland im Norden, sterreich im Osten, Italien im Sden und Frankreich im Westen, 80% der Schweiz sind Berge. Die Hauptstadt der Schweiz ist Bern, knapp zwei Autostunden von Bem entfernt liegen die Berge Eiger (3 970 m), Mnch (4 107 m) und jungfrau (4 158 m). Die Region gehrt zum Weltnaturerbe der UNESCQ, Der Groe Aletschgletscher beginnt hier, Er ist 24 km lang. ? 1)Create a set of at least 3 different fractions that totals 1. Write all fractions in simplest form. In simplest form, the fractions must have different denominators. (ex. + 1/6 + 1/3 = 3/6 + 1/6 + 2/6 = 6/6 = 1) 2)Create a set of a least 3 fractions that has a total that is less than 1 but very close to 1. Write all fractions in simplest form. In simplest form, the fractions must have different denominators. The total is how much less than 1?3) Create a pair of fractions that has a product that is very close to 1. In simplest form, the fractions may not use any digit more than once. What is the difference between the product and 1? McNight Industries completed the following transactions during 2018:Journalize the transactions. Explanations are not required. Round to the nearest dollar. (Record debits first, then credits. Exclude explanations from journal entries.) Nov. 1: Made sales of $52,000. McNight estimates that warranty expense is 6% of sales. (Record only the warranty expense.) McNight estimates that warranty expense is 6% of sales. (Record only the warranty expense.) 20 Paid $1,600 to satisfy warranty claims. 31 Estimated vacation benefits expense to be $6,000. 31 McNight expected to pay its employees a 3% bonus on net income after deducting the bonus. Net income for the year is $52,000. Dec. if a perfectly competitive firm sells 30 units of output at a price of $10 per unit, its marginal revenue is: An evaluation of the effects of COVID-19 on work efficiency and effectivity based on societal pressure and anxiety among health workersA. Cross-sectional surveyB. Randomized controlled trialsC. Qualitative researchD. Cohort studyE. Case-control study What is the law of conservation of energy? Represent the following sentence as an algebraic expression, where "a number" is the letter x.\text{Twice a number.}Twice a number. Find the area of a parallelogram defined by the vector A(6,3,1)m and B(-2,4,5) Which joint permits limited gliding movement and can be found in the bones of the wrist? A) Arthrodial B)Condyloid C) Ball and Socket D) Trochoidal Determine if the two triangle are congruent. If they are state how you know Sometimes, however, a lack of self-confidence can come from feelings ofinsecurity. Sometimes we have negative feelings about ourselves and we burythem deep inside. When we do this, we tend to avoid taking chances.What does the author MOST LIKELY want the reader to believe about insecurity based on thisintroduction?AInsecurity is best avoided by burying negative feelings deep insideBInsecurity is something we need to change in order to take chancesInsecurity is not a good reason for lacking self-confidence.DInsecurity is something very few people actually experience: Given the equation representing a reaction: h + h h2 what occurs during this reaction? high levels of pollution will most likely Suppose demand and supply are given by Q=50-P and Q=1.0P-10. a. What are the equilibrium quantity and price in this market? Equilibrium quantity: ................Equilibrium price: $ ................Determine the quantity demanded, the quantity supplied, and the magnitude of the surplus if a price floor of $45 is imposed in this market. Quantity demanded: .......................Quantity supplied: ...................Surplus: __________________ 7. Stages through which groups progress:(2 Points) Forming, storming, norming, performing, and adjourning Forming, norming, storming, performing, and adjourning Forming, performing, storming, norming, (4x)" 7) (9 pts) Consider the power series -1(-1)"! n=1 2n a. Find the radius of convergence. b. Find the interval of convergence. Be sure to check the endpoints of your interval if applicable to Two children weigh 160 pounds together the oldest weighs 120 pounds more how much do they each weigh What are two types of professional forecasts and how do the differ? round your answer to one decimal place 109.918 Explain James Madison's goals as President of the United States.