Mathematics College

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Answers

Answer 1

Answer:

Option A

Step-by-step explanation:

We know that for an eqn. [tex]ax^{2} +bx+c=0[/tex] , the quadratic formula is =

[tex]x = \frac{-b+\sqrt{b^{2}-4ac } }{2a} or \frac{-b-\sqrt{b^{2}-4ac } }{2a}[/tex]

So using quadratic eqn. for [tex]x^{2} -6x-5=0[/tex]

[tex]x =\frac{-(-6)+\sqrt{(-6)^{2}-4*1*(-5) } }{2*1}or\frac{-(-6)-\sqrt{(-6)^{2}-4*1*(-5) } }{2*1}[/tex]

[tex]=> x = \frac{6+\sqrt{36+20} }{2} or\frac{6-\sqrt{36+20} }{2}[/tex]

[tex]=>x = \frac{6+\sqrt{56} }{2} or\frac{6-\sqrt{56} }{2}[/tex]

Related Questions

(3, 4) and (5, -8)
a . 6
b . 1/2
c . 1/5
d . -2

Answers

Answer:

If you are looking for the slope, it equals -6

Step-by-step explanation:

(3,4) (5, -8)

[tex]\frac{4+8}{3-5}[/tex] = [tex]\frac{12}{-2}[/tex] = [tex]\frac{6}{-1}[/tex] = -6

Hey there!

The formula to this equation is: y2 - y1 /x2 - x1

• y2 = -8

• y1 = 4

• x2 = 5

• x1 = 3

EQUATION:

-8 - 4/5 - 3

-8 - 4 = -12

5 - 3 = 2

NEW EQUATION: -12/2

-12/2 = your answer

-12 / 2 = -6 because 2 • -6 = -12

Answer that you’re looking for: -6

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

Guide to REMEMBER :

- Negative & Negative = Positive

- Negative & Positive = Negative

- Positive & Positive = Positive

- Positive & Negative = Negative

Please help with number 3 and 4

Answers

Answer:

3.

7d=7x7=49

2g=2x10=20

49-20 = 29

Step-by-step explanation:

4.

bc=8x2 = 16

c^3= 2x2x2 =8

bc - c^3 = 16-8 =8

Can some one help me I will give the brainliest

Answers

Answer:

j,z

Step-by-step explanation:

a service station has 92-octane and 98-octane gasoline. How many liters of each should be mixed to provide 12 liters of 96-octane gasoline needed for chemical research

Answers

we use the rectangle rule

96-92=4 parts of 92 octane

98-96=2 parts of 98 octane

4x+2x=12

6x=12

x=2

4x=8 liters of 92 octane

2x=4 liters of 98 octane

1.Plastic plates come in packs of 8, plastic utensils come in packs of 12, and plastic cups come in packs of 20. What are the least numbers of packs you should buy in order to have the same number of plates, utensils, and cups?

Answers

Answer:

Least no of packs = 120

Step-by-step explanation:

Given that,

Plastic plates come in packs of 8, plastic utensils come in packs of 12, and plastic cups come in packs of 20.

We need to find least numbers of packs you should buy in order to have the same number of plates, utensils, and cups.

It means we need to find the LCM of 8,12,20

Prime factorisation of 8 = 2×2×2

Prime factorisation of 12 = 2×3×2

Prime factorisation of 20=2×5×2

LCM = 120

Hence, there are 120 least number of packs you should buy in order to have the same number of plates, utensils, and cups

Tara's graduation picnic costs $2 for every attendee. Write an equation that shows the
relationship between the attendees x and the cost y.

Answers

Answer:

y = 2x

Step-by-step explanation:

Y = 2x

If the perimeter of this triangle is 15 centimeters, what is the value of n

Answers

Answer:

n = 5/2

Step-by-step explanation:

Add all of the sides up to make an equation

(5n - 6) + n + (2n + 1) = 15

8n -5                          = 15

8n  =  20

n    = 5/2

Answer:

[tex]0.4cm[/tex]

Step-by-step explanation:

[tex]n + 2n+1 + 5n-6 = 15\\[/tex]

[tex]8n -5 = 15[/tex]

[tex]8n = 20[/tex]

[tex]n = \frac{8}{20}[/tex]

[tex]n = 0.4[/tex]

[tex]\therefore[/tex] the value of [tex]n[/tex] is [tex]0.4cm[/tex]

Hope this helps :)

PLEASE HELP ME IM TAKING TIMED TEST I WILL MARK YOU AS BRAINLEST!!

Answers

Answer:-4.5, -0.5, 0.3, 0.7, 2.3

Step-by-step explanation:

how far is 10% of a 2000 kilometer trip

Answers

answer:
10 2000
1x200=
200

An emergency medical technician earns $19.71 per hour. One month she earns a gross pay of $3326.06. How much did she make per week if it was a 4.5 - week month? Round off the answer to two decimal places also. How much did she make per week if it was a 4.5 - week month? Round off the answer to two decimal places.

Answers

Answer:

The emergency medical technician made $739.12 per week

Step-by-step explanation:

Given that:

Per hour pay = $19.71

One month earning of emergency medical technician = $3326.06

Weeks in the following month = 4.5

For per week income, we will divide the monthly salary by number of weeks in the month.

Per week income = [tex]\frac{3326.06}{4.5}[/tex]

Per week income = $739.12

Hence,

The emergency medical technician made $739.12 per week

A researcher wants to be sure that the sample in her study is not unrepresentative of the distribution of ethnic groups in her community. Her sample includes 300 whites, 80 African Americans, 100 Latinos, 40 Asians, and 80 others. In her community, according to census records, there are 48% whites, 12% African Americans, 18% Latinos, 9% Asians, and 13% others. Is her sample unrepresentative of the population in her community

Answers

Answer:

Yes. Her sample is unrepresentative of the population in her community.

Step-by-step explanation:

a) Data and Calculations:

Population                Study  Census %     Representative       Over/Under

                               Sample                           Sample              Representation

Whites                       300        48%           288 (48% * 600)         12

African Americans      80         12%             72 (12% * 600)           8

Latinos                       100         18%           108 (18% * 600)           (8)

Asians                         40          9%             54 (9% * 600)           (14)

Others                        80         13%             78 (13% * 600)            2

Total                         600      100%          600                                0

b) There is selection bias in her sample. A representative sample of 600 is the subset of a population that seeks to accurately reflect the characteristics of the larger group.   When the sample for each category does not accurately represent the characteristics or attributes of the population categories, then it is unrepresentative.

Sampling is the collection of randomly chosen data from the entire population to come to an end conclusion about the variable to be determined or known.

Yes, the sample is unrepresentative of the entire population.

The reason for the sample being unrepresentative of the entire population in her community is that the selected sample is deviating a lot from the population count.

As per the computation, there is selection bias in her sample. This is because the representative sample is 600 that represents the entire population and reflects the characteristics of the larger group.

The sample becomes unrepresentative when the sample chosen does not accurately represent the true attributes of the population.

To know more about sampling, refer to the link:

https://brainly.com/question/350477

In great detail, with full work done out, please find x
1 + x = 2

Answers

Answer:

x = 1

Step-by-step explanation:

1 + x = 2

Subtract 1 form both sides,

1 + x - 1 = 2 - 1

       x  = 1

A company tested their new golf ball by having 202020 professional golfers each hit 100100100 shots with the company's new ball and 100100100 shots with the golfer's current ball (in a random order). The labels were removed, so the golfers didn't know which balls were which. The golfers, on average, hit their shots significantly farther with the new ball. The company cites this study in an advertisement claiming that this new ball will help all golfers hit farther shots. Why is the company's claim not appropriate

Answers

Answer: it only included professional golfers

Step-by-step explanation:

It said it was right

The company's claim is incorrect. Only professional golfers took part.

What is the professional golfers?

The Head Golf Professional is responsible for continuously developing and implementing all service standards through careful hiring and employee training. Furthermore, he or she is in charge of maximizing income in all aspects of the golf operation while staying within the allocated budget.

There's a lot more to being a professional golfer than meets the eye. For example, did you know that their hourly wage is $18.81 on average? That works out to $39,134 per year! Between 2018 and 2028, the career is expected to grow 11%, resulting in 30,500 job openings nationwide.

To be certified as a professional golfer by the PGA, you must either have a bachelor's degree in a related discipline, such as professional golf management, or have completed the PGA professional golf management apprenticeship program.

To learn more about  professional golfers refer to:

https://brainly.com/question/13800403

#SPJ2

pleas help u get 16 points and brainy. find the area

Answers

Answer:

153 in²

Step-by-step explanation:

first look at yellow area, then red area, then green area.

48 + 50 + 55 = 105 + 48 = 153 in²

hope this helps ^-^

4/5 times 1/5 PLZ ANSER I NEED HELP

Answers

Answer:

.16 or 4/25

Step-by-step explanation:

Answer:

4/25

Step-by-step explanation:

[tex]\frac{4}{5}[/tex]×[tex]\frac{1}{5}[/tex]

multiply tops together and denominators together and get [tex]\frac{4}{25}[/tex]

Which expression is a possible leading term for the polynomial function graphed below?
8
4
2
2
0.48
O _4,5
O4x5
o 4x

Answers

Answer:

Answer is (A) -4x^8

Step-by-step explanation:

LOOK AT PICTURE, WHOEVER HAS CORRECT ANSWER, I WILL MARK BRAINIEST :)

Answers

Answer:

C is the answer?

The correct answer is C




Happy holidays

Jacob went camping with his family. At 7:15 A.M., Jacob set out to go fishing. It took 1 hour and 45 minutes to hike to the lake. Jacob spent 3 hours and 45 minutes fishing, and it took 1 hour and 15 minutes to hike back. What time was it when Jacob got back to camp?

Include A.M. or P.M. in your answer Please help me fast!!,

Answers

The answer is 2 P.M.
Jacob returned at 2PM

15) Miguel made $6,743 in February and $8,152 in March. Which is the best 4 estimate for the amount of money Miguel earned when rounding to the nearest hundred. *​

Answers

Answer:

$14,900

Step-by-step explanation:

Given that,

Miguel made $6,743 in February and $8,152 in March.

We need to find the amount of money Miguel earned.

It is equal to the sum of amount made in February and March.

Sum = $6,743 + $8,152

= $14895

Nearest hundred :

Sum = $14,900

Hence, the total amount is $14,900.

Find the Hcmof 40 and 60​

Answers

The higher common factor of 40 and 60 is 20. Hope it helped

A hummingbird's heart rate while resting is about 7,500 beats every 30 minutes. How many more beats does a hummingbird's heart beat in 60 minutes than a human baby's heart? It was on the last question

Answers

Answer:

This is what I got, hope u get it right

Step-by-step explanation:

The Giant Hummingbird beats its wings 10-15 times per second. The fastest recorded rate is about 80 beats per second on an Amethyst Wood- star Hummingbird.

85 is the answer........

Find the value of: 2.52 =​

Answers

Answer:

6.25

Step-by-step explanation:

Since 2.5 is squared, we should multiply it by itself once which will give us 6.25

Answer:

2.5^2 = 6.25

Step-by-step explanation:

2.5^2 is basically the same thing as 2.5*2.5, so you can do these either way if you like.  You should get 6.25 as your result of the answer.

A dozen plain hats cost $3.60. What is the unit rate of a hat? Write your answer as a comparison statement.

These are for exams please answer quick!!

Answers

Answer:0.3

Step-by-step explanation:

3.60/12=0.3

Evaluate the following expression when x = 3 and y = 4:

Fraction with x squared plus y cubed in the numerator and 2 plus x in the denominator.

Answers

Answer:

You would get 14.6

3 squared (3×3) equals 9 and 4 cubed (4×4×4) equals 64. Adding 9 and 64 equals 73. 2 plus 3 equals 5 and 73 divided by 5 is equal to 14.6

Please only correct answer

Answers

Answer:

second vala hai correct Answer

Answer:

[tex](\sqrt{x})^{2} = \sqrt{x^{2} }[/tex]

Please help me thank you so much I appreciate it for the helping hand !!!!!

Answers

Answer:x=7

Step-by-step explanation:

Steps down below. Remember that angles on a straight line add up to 180 degrees

The table shows the results of a random survey about the mayor's performance. The mayor
is running for re-election. A total of 2,400 people are expected to vote in the election. Based
on the data, which is the most likely result?

Answers

Answer:

the mayor will lose in a close race

Step-by-step explanation:

Convert 0.001 kL to g

Answers

Answer:

1000 g

Step-by-step explanation:

That is the answer

Answer:

Step-by-step explanation:

1 gram.

A boy had 72 coins and lost 25% of them How muy coins
did he have left?

Answers

Answer:

54 coins left

Step-by-step explanation:

72 x .25 = 18

72 - 18 = 54

Answer:

100% - 25% = 75%

72 x 0.75 = 54

He had 54 coins left

Step-by-step explanation:

Ok, to solve this question, first divide 72 by 100--- 72/100=.72

next, multiply .72*25 and u get--- 18

next subtract 72 and 18--- 72-18=54

the answer is the boy has 54 coins left

hope this helps!

Which of the following is not a rate?
35km/5 min 240miles/8 miles 95 words/1 minute 16oz/1 lb

Answers

Answer:

240 miles/ 8 miles

Step-by-step explanation:

you can't measure a mile per mile (/=per)

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