Please help!! What Find the Error and explain why it is wrong!

Please Help!! What Find The Error And Explain Why It Is Wrong!
Please Help!! What Find The Error And Explain Why It Is Wrong!

Answers

Answer 1

Answer:

First image attached

The error was done in Step E, because student did not multiply [tex]2\cdot x -8[/tex] by the negative sign in numerator. Step E must be [tex]\frac{2\cdot x -5}{(x+4)\cdot (x-4)}[/tex].

Second image attached

The error was done in Step C, because the student omitted the [tex]2\cdot a \cdot b[/tex] of the algebraic identity [tex](a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}[/tex]. Step C must be [tex]5\cdot x = x^{2}+4\cdot x + 4[/tex]

Step-by-step explanation:

First image attached

The error was done in Step E, because student did not multiply [tex]2\cdot x -8[/tex] by the negative sign in numerator. The real numerator in Step E should be:

[tex]3-(2\cdot x -8)= 3-2\cdot x+8 = 11-2\cdot x[/tex]

Hence, Step E must be [tex]\frac{2\cdot x -5}{(x+4)\cdot (x-4)}[/tex].

Second image attached

The error was done in Step C, because the student omitted the [tex]2\cdot a \cdot b[/tex] of the algebraic identity [tex](a+b)^{2} = a^{2}+2\cdot a\cdot b +b^{2}[/tex]. Step C must be [tex]5\cdot x = x^{2}+4\cdot x + 4[/tex]

And further steps are described below:

Step D

[tex]x^{2}-x+4 = 0[/tex]

Which according to the Quadratic Formula, represents a polynomial with complex roots. That is: ([tex]a = 1[/tex], [tex]b = -1[/tex], [tex]c = 4[/tex])

[tex]D = b^{2}-4\cdot a\cdot c[/tex]

[tex]D = (-1)-4\cdot (1)\cdot (4)[/tex]

[tex]D = -17[/tex] (Conjugated complex roots)

Step E

[tex](x-0.5-i\,1.936)\cdot (x-0.5+i\,1.936) = 0[/tex]

Step F

[tex]x = 0.5+i\,1.936\,\lor\,x = 0.5-i\,1.936[/tex]


Related Questions

Miguel is multiplying 58 by 12.

Answers

Answer:

696

Step-by-step explanation:

Here is the step-by-step.

What is the value of square root 30 is between witch two integers
A-4and5
B-5and6
C-6and7
D-7and8

Answers

Answer:

b

Step-by-step explanation:

because

can i get help here ?

Answers

It will be 10z-30
Because you are collecting like terms with -5z and +5z and it will give you 10z and 30 will be by it’s self because it has nothing to add or subtract with .

What postulate proves the two triangles are congruent?

Answers

Answer:

If two sides and the included angle of one triangle are equal to the corresponding sides and angle of another triangle, the triangles are congruent

Step-by-step explanation:

I'm not sure the answer

Veronica take 1/3 of an hour to write 1/4 of a page of calligrahpy how long will it take Veronica to write one page

Answers

Answer:

b because it takes 1 hour to complete 3/4 of a page so 3/3 = 1 hour 1 1/3 =1 and a third of an hour

Step-by-step explanation:

Mr. Williams drove 440 miles in 8 hours, on the highway, at a steady speed. How far could he drive in five hours at the same average speed?

Answers

Answer:

275 miles

Step-by-step explanation:

9 ⋅ (-.5) what is the answer

Answers

Answer:

-45

Step-by-step explanation:

9x5=45, and since there is a negative, you put it before 45.

Hope I helped!

Please mark Brainliest!!!

What is 3250 divided by 1/2

Answers

Similar to 3250 times 2
Which is equal to 6500

Answer:

6500

Step-by-step explanation:

KCF

3250/1 ÷ 1/2

3250/1 x 2/1

3250 x 2=  6500

1 x 1 = 1

final answer 6500/1 or 6500

what is one thousandth less than 0.061

Answers

Answer:

one thousandth is greater than 0.061

Step-by-step explanation:

Find the value of x.
Find the value of y.
Y
61
X

Answers

Answer:

61=x ( vertical opposite angle)

61=y (corresponding angle)

Step-by-step explanation:

y = 61°( corresponding angles)

x = y = 61°(vertically opposite angles)

Each week as part of her workout, Monica walks 0.5 mile, runs 1.6 miles, and then walks 0.75 mile.

How many total miles will Monica walk and run in a year? Reminder: there are 52 weeks in a year.

Enter your answer in the box.

miles

Answers

Answer:

-2 or -5

Step-by-step explanation:

( shown in photo below )

Monthly, Juan's net earnings are $6,000, and expenses are $5,000. If Juan saves the difference, how much will Juan have saved after 6 years

Answers

Answer:

$72,000

Step-by-step explanation:

6000-5000=1000

1000x6 =6000

6000x12=72,000

Write an equation of the line that passes through (-1,3) and is parallel to the line y=2x+2

Answers

Answer:

The new line will be parallel to the line represented by y =2x +2

The equation y = 2x + 2 is written in slope- intercept form (i.e. y=mx + b) where m represents the slope.  So the slope of this line is 2.   A line parallel to y = 2x + 2 will have the same slope.  This means the slope of the new line will also be 2.  

To determine the equation of the new line, we can use the given point  to find the y intercept of the new line:

y = 2x + b

Use x = -1 and y =3 to find b (or the y intercept ) of the new line:

3 = 2 * (-1) + b

3= -2 + b

b=5

Therefore, the equation of the line passing thru (-1,3) with the same slope as that of y = 2x + 2 will be:  y = 2x + 5

(Hope it can help)

Answer:

y=2x+5

Step-by-step explanation:

hope you understood

Please answer the screenshot I attached below

Answers

Answer:

i think the answer is

[tex] \frac{1}{ {x}^{ \frac{4}{3} }} [/tex]

can someone help me with this

Answers

Answer:

16 + 10 ÷ 2

Step-by-step explanation:

We adding 16 to 10. So, 16 + 10. We then divide it by two. So, it is 16 + 10   2

Answer please here is a picture:

Answers

Answer:

Step-by-step explanation:

No, 3/4 is equivalent to 0.75 so 0.34 and 3/4 are not equivalent.

Answer:

no

Step-by-step explanation:

because 3/4 equals to 0.75 or 75%

1/4 = 0.25 or 25%

2/4 or 1/2 = 0.50 or 50%

3/4 = 0.75 or 75%

4/4 or 1 = 1 or 100%

i am less than 10, i am a multiple of 2, i am a composite.

Answers

Answer:

8

Step-by-step explanation:

Suppose that the economy is experiencing a recession with an estimated recessionary gap of $10 billion. Congress is considering the use of fiscal policy to ease the recession, but due to current political sentiments, it has determined that the maximum spending increase the government is willing to support is $3 billion. It wants to make up the remainder of the recessionary gap using tax cuts.

If a spending increase of $3 billion is approved and the MPC is 0.6, by how much will taxes need to be reduced to close the remainder of the recessionary gap?

Answers

Answer:

4.66 billion

Step-by-step explanation:

Find the surface area of this triangular prism. Be sure to include the correct unit in your answer.
18 cm
30 cm
24 cm
22 cm

Answers

18 cm is your correct answer

AB×6=BBB (playing with numbers.)

Answers

Answer:

A = 7

B = 4

Step-by-step explanation:

If u wanna know how i got this answer plz look at the comments below since it will delete my answer U-U

The average number of passes in a football game is right skewed with mean 75 and variance 961. If we sample 100 random games, what is the probability our average would be more than 83.7?

Answers

Answer:

0.0066

Step-by-step explanation:

Given that:

Mean [tex]\mu[/tex] = 75

Variance [tex]\sigma^2 =961[/tex]

The standard deviation [tex]\sigma = \sqrt{961} = 31[/tex]

The sample size n = 100

[tex]\mu = \mu_{\overline x} = 75[/tex]

[tex]\sigma _{\overline x} = \dfrac{\sigma }{\sqrt{n}}[/tex]

[tex]\sigma _{\overline x} = \dfrac{31 }{\sqrt{100}}[/tex]

[tex]\sigma _{\overline x} = \dfrac{31 }{10}}[/tex]

[tex]\sigma _{\overline x} = 3.1[/tex]

[tex]P(\overline x > 83.7) = 1 - P( \overline x < 83.7)[/tex]

[tex]P(\overline x > 83.7) = 1 -P\bigg ( \dfrac{\overline x - \mu_{\overline x} }{\sigma _{\overline x}} < \dfrac{83.7 - 76}{3.1} \bigg)[/tex]

[tex]P(\overline x > 83.7) = 1 -P\bigg ( Z< \dfrac{7.7}{3.1} \bigg)[/tex]

[tex]P(\overline x > 83.7) = 1 -P ( Z< 2.48)[/tex]

Using the Z table;

P(x > 83.7) = 1 - 0.9934

P(x > 83.7) = 0.0066

Thus, probability = 0.0066

Helpp meee!?!!!!!
?!!?!
!?!

Answers

Answer:

You have to draw we cant draw 4 you sorry i cant help

Step-by-step explanation:


A bag contains 5 RED beads, 3 BLUE beads, and 4 GREEN beads. If a single bead is picked at random, what is the probability

Answers

Answer:

total number of beads :-

5+3+4=12

probability is :-

number of times a specific outcome has occurred

total number of possible outcomes

red beads - 5/12

blue beads - 3/12

green beads - 4/12

the above given fractions are the probabilities of each color bead.

Step-by-step explanation:

hope this helps, if yes please can u give me a brainly?

i would really apreciate it...

have a great day ahead :)

Ms. Swanson asked the question how does knowing the fact 6x5 help you find 60x500? can someone help me my teacher wrote this

Answers

Answer:

YOU DID THAT TEST? samee

Step-by-step explanation:

5x-7=5x bud it no solution one solution infinitely many solutions

Answers

Answer:

When you add 2+3 which equals 5 so it’ll be y=5x-7. And plug in y into the other equation. 5x-7-5x+8=0. -7-8=0, -7-8 =-1 therefore there is no solution because-7-8= -1 not 0.

Step-by-step explanation:

Urn 1 contains 4 green and 5 yellow marbles. Urn 2 contains 7 green and 4 yellow marbles. An experiment consists of choosing one of two urns at random then drawing a marble from the chosen urn. Urn 1 is more likely to be chosen than Urn 2 with probability 0.63.

Required:
a. What is the probability that a green marble was chosen?
b. What is the probability that a yellow marble was chosen, if it is known that Urn 2 was chosen?
c. What is the probability that Urn 1 was chosen, if it is known that a yellow marble was drawn?

Answers

Answer:

a

[tex]P(N_g) = 0.5155[/tex]

b

 [tex]P(K ) = 0.36364[/tex]

c

[tex]P(U1 | N_y ) = 0.7223[/tex]  

Step-by-step explanation:

From the question we are told that

  The number of green marbles in Urn 1 is  [tex]N_g = 4[/tex]

   The number of yellow marbles in Urn 1 is [tex]N_y = 5[/tex]

   The number of green marbles in Urn 2 is  [tex]n_g = 7[/tex]

   The number of yellow marbles in Urn 1 is [tex]n_y = 4[/tex]

    The probability of choosing Urn 1 is  [tex]P(U1) = 0.63[/tex]

    The probability of choosing Urn 2 is [tex]P(U2) = 1- 0.63 =0.37[/tex]

Generally the total marble in Urn 1 is  

     [tex]N_t = N_g +N_y[/tex]

=>  [tex]N_t = 4 + 5[/tex]

=>  [tex]N_t = 9[/tex]

Generally the total marble in Urn 2 is  

     [tex]n_t = n_g +n_y[/tex]

=>  [tex]n_t = 7+4[/tex]

=>  [tex]n_t = 11[/tex]

Generally the probability of choosing green marble is

     [tex]P(N_g) = P(U1 ) * \frac{N_g}{N_t} + [P(U2 ) * \frac{n_g}{n_t} ][/tex]

=>   [tex]P(N_g) = 0.63 * \frac{4}{9} + [0.37 * \frac{7}{11} ][/tex]

=>   [tex]P(N_g) = 0.5155[/tex]

Generally  the probability that a yellow marble was chosen, if it is known that Urn 2 was chosen is mathematically represented as

     [tex]P(K ) = \frac{n_y}{n_t}[/tex]

=>   [tex]P(K ) = \frac{4}{11}[/tex]

=>   [tex]P(K ) = 0.36364[/tex]

Generally the probability of choosing yellow marble is

     [tex]P(N_y) = P(U1 ) * \frac{N_y}{N_t} + [P(U2 ) * \frac{n_y}{n_t} ][/tex]

=>   [tex]P(N_y) = 0.63 * \frac{5}{9} + [0.37 * \frac{4}{11} ][/tex]

=>   [tex]P(N_y) = 0.4845[/tex]

Generally  the  probability that Urn 1 was chosen, if it is known that a yellow marble was drawn is mathematically represented as

     [tex]P(U1 | N_y ) = \frac{ P( U1 \ n N_y)}{P(N_y)}[/tex]

=>   [tex]P(U1 | N_y ) = \frac{0.63 * [\frac{5}{9} ] }{0.4845 }[/tex]

=>   [tex]P(U1 | N_y ) = 0.7223[/tex]      

solve this question step by step​

Answers

Answer:

BE = 49

Step-by-step explanation:

In triangle BDC

  65^2=56^2+BD^2

  65^2-56^2=BD^2

  4225-3136=BD^2

  1089=BD^2

   33=BD

In triangle FDE

    65^2=63^2+DE^2

    4225-3969=DE^2

    256 = DE^2

    16=DE

since ED+DB=BE

THEREFORE

      16+33=BE

         49=BE

Annalise withdraws $20.50 each day from her account for a week. how can you represent the change in the account for the week

Answers

Answer:

you can get some fries and chickent aint enough for me keep it going people

Step-by-step explanation:

A hot air balloon is rising at a speed of 100 m/min. If an observer is standing 200 m from the lift-off point, what is the rate of change of the angle of elevation of the observer’s line of sight when the balloon is 600 m high?

Answers

Answer:

dy/dt = (0)tan(π/3) + (4)sec2(π/3)(0.1)

dy/dt = 0 + 1.6

dy/dt = 1.6 mi/min

Step-by-step explanation:

We need to find out values for all of the variables:

The observer is not moving, therefore dx/dt = 0.

The observer is standing 4 miles away from the lift-off point, so x = 4.

The angle between the horizontal and the observer's line of sight is π/3, therefore θ = π/3.

The rate of change for the angle, dθ/dt, is 0.1.

The rate of change of the angle of elevation of the observer’s line of sight when the balloon is 600 m high is 0.05 rad/min.

Let θ be the angle of elevation of the line of sight from the horizontal. Since the hot air balloon is rising at a speed of 100 m/min, its vertical distance in time, t is d = vt = 100t.

Since the point of the observer is 200 m away( the horizontal distance), then tanθ = vertical rise/horizontal distance = 100t/200 = t/2

tanθ = t/2

To find the rate of change of the angle of elevation, we differentiate with respect to t.

So, dtanθ/dt = d(t/2)/dt

sec²θdθ/dt = 1/2

dθ/dt = 1/(2sec²θ)

At 600 m high, tanθ = vertical rise/horizontal distance = 600 m/200 m = 3

Given that tan²θ + 1 = sec²θ

dθ/dt = 1/(2sec²θ)

dθ/dt = 1/(2[tan²θ + 1])

Since tanθ = 3

dθ/dt = 1/(2[tan²θ + 1])

dθ/dt = 1/(2[3² + 1])

dθ/dt = 1/(2[9 + 1])

dθ/dt = 1/(2[10])

dθ/dt = 1/20

dθ/dt = 0.05 rad/min

So, the rate of change of the angle of elevation of the observer’s line of sight when the balloon is 600 m high is 0.05 rad/min.

Learn more about rate of change of angle of elevation here:

https://brainly.com/question/13932041


At a local baseball game, the concession stand has two different meal choices. You can get 7 hotdogs and 5
drinks for $41.00 or you can get 4 hotdogs and 8 drinks for $44.00. If the price of hotdogs and drinks is the
same for each meal, find how much it costs for an individual hotdog and how much it costs for an individual
drink.
per hotdog:

per drink:

Answers

Answer:

Each hotdog is $3 and each drink is $4.

Step-by-step explanation:

Let h be the number of hotdogs and d the number of drinks,

7h + 5d = 41

4h + 8d = 44

Let's eliminate h.  Multiply the first by 4 and the second by 7.

28h + 20d = 164

28h + 56d = 308

Subtrat the first from the second.

36d = 144

d = 4

Substitute back into one of the equations.

7h + 5(4) = 41

7h + 20 = 41

7h = 21

h = 3

Other Questions
Test the hypothesis using the P-value approach. Be sure to verify the requirements of the test. Upper H 0: pequals0.6 versus Upper H 1: pgreater than0.6 nequals200; xequals135, alphaequals0.05 Is np 0 (1 minus p 0 )greater than or equals10.Use technology to find the P-Value. A man is in a boat 2 miles from the nearest point on the coast. He is to go to point Q, located 3 miles down the coast and 1 mile inland (see figure). He can row at a rate of 4 miles per hour and walk at 4 miles per hour. Toward what point on the coast should he row in order to reach point Q in the least time? Please give me the correct answer Simplify the expression. 13[6^2/(5^2 - 4^2)+9] Noncompensatory stock option plans have all of the following characteristics except:__________ a. participation by substantially all full-time employees who meet limited employment qualifications. b. equal offers of stock to all eligible employees. c. a limited amount of time permitted to exercise the option. d. a provision related to the achievement of certain performance criteria. The scatterplot below shows the relationship between the maximum height in feet, x, of several roller coasters and their top speed in miles per hour, y. Describe the direction, form, and strength, as well as any unusual observations .A) The association between maximum height and top speed is positive, linear, and strong. There are no unusual observations.B)The association between maximum height and top speed is positive , linear, and strong. There is one unusual observation at approximately (170, 150) .C) The association between maximum height and top speed is positive, nonlinear, and strong. There is one unusual observation at approximately (170, 150) .D) The association between maximum height and top speed is positive, linear, and moderate. There are no unusual observations.E) The association between maximum height and top speed is positive, nonlinear, and moderate . There is one unusual observation at approximately (170 , 150) The point (4, 2) is reflected across the x-axis. A coordinate plane. What are its new coordinates? (4, 2) (4, 2) (4, 2) (4, 2) If your body is making new skin cells all the time, why do you sometimes get a scar from a cut?PLEASE HELP ASAPPPPPP!!!! THXXXX 10 POINTSSS compose a short story which gives the moral Dont count your chickens before they are hatched PLZ HURRY WILL MARK BRAINLIEST :D A large land area that is part of a continent is a ___A) monsoon B) subcontinent C) Peninsula use synthetic division to solve (3x^4+6^3+2x^2+9x+10)/(x+2). what is the quotient 4. Near the end of the Middle Ages, what religious issues weakened the Christian Churchs authority over people?People lost faith in Church leaders after the Black Death killed so many of their loved ones.People protested against the Churchs practice of pressuring families to send their sons to monasteries.People left the Christian Church as new, more appealing religions began to spread throughout Europe.People claimed that the Church was corrupt in its focus on material wealth and art (images) as routes to spiritual salvation. PLZZZZZZZZZZZZZZZZZZZ HELP THIS DUE TODAY AND NO ONE HELPING I SWEAR THE PEOPLE ANSWER THESE QUESTIONS WERE TROLLING PLZ I NEED THIS DONE!!!TEXT: The first effect of the creation of the 13 colonies was that Britain grew very rich. Each colony now had productive farms and new towns growing as trading posts. Britain profited from these by taxation. Everything grown, bought or sold in the American Colonies was somehow taxed by Britain.Another effect was the British Colonies became destinations for thousands of immigrants from England and elsewhere in Europe. Wealthy Europeans were eager to claim new land for plantations or make fortunes from trade in the new cities. Middle-class European farmers hoped they could get new farmland of their own. Many poor English and Scots-Irish settlers hoped they could find better lives in America working as indentured servants and hopefully purchasing land of their own someday.Every new English colony was a new disaster for the Native Americans. The forests they hunted were cut down to make way for farms and plantations. More and more tribes became pushed off their land, either being cheated by false negotiations, or forced out with violence. When tribes fought back, the English settlers would retaliate harshly with gunfire and arson, burning entire villages to the ground. Worse still was the invisible killer that British settlers brought with them: diseases like smallpox and plague, which spread among native tribes quickly and for which they had no immunity or treatments. Sometimes, colonists would give infected blankets to natives to spread diseases on purpose. Ultimately for the native tribes, the effects of British settlement in America were tragic and irreversible. By the mid 1700s, most tribes had nearly vanished from the Atlantic coast.The final effect of the British Colonies was the introduction of slavery to North America. The first kidnapped Africans in the American Colonies were brought to Jamestown as slaves to work in the new tobacco plantations. Slavery would spread throughout the new colonies, with cities as far north as New York being used as trading posts for slave auctions. Mainly however, slavery was much more concentrated in the southern colonies, which had large tobacco and rice plantations requiring many laborers. In the Southern Colonies, African people were simply considered property. Laws in Maryland only referred to Africans in terms of planters property rights. A Virginia law in 1642 punished people for hiding runaway slaves or indentured servants. Free blacks were eventually permitted to live and own property in northern colonies, and slavery in the north slowly became outlawed. In the south, however, the plantation economies of the colonies depended almost completely on slave labor.17. In the chart below, summarize how each group of people was affected by the formation of the 13 British ColoniesBritish PlantersPoor European ImmigrantsNative AmericansKidnapped Africans DNA regions that are transcriptionally silenced by hypercondensation have often undergone a modification of their _______ residues termed _______.a. hyperoxidation.b. methylation.c. dephosphorylation.d. phosphorylation.e. integration. How many tiles are there in figure 0? What is Lymes Disease scientific name? Question 3 of 8Which of the following statements contain a variable? Check all that apply.A. Half the area of the roof.B. Sixteen feet long.C. The number of people added to the group.D. She ran 40 yards.SUBMIT Lucas wants to write 3 2 as a mixed number. He performs the division below. 3 2 = 1 R1 Explain how to write the quotient as a mixed number. Drag the words to complete the explanation. Words may be used once or not at all. quotientdivisordividendremainder Use the whole number part of the as the whole number part of the mixed number. Write the in the numerator of the fraction and write the in the denominator of the fraction. Over the course of 5 games, a football team scores an average of 14 points with an absolute deviation of 4 points. What were the football team's least and greatest scores?