Mathematics College

Solve the equation
2x2 + 12x - 7 = 0
by completing the square.
Give your answers correct to 2 decimal places.
Show step by step please!!!!

Answers

Answer 1

Step-by-step explanation:

4+12x=7

12x=7-4

12x=3

X=3/12

X=0.25

Related Questions

lil fun for yall
what is the answer to this step by step?

Answers

Answer:

194332.125 is the amount of interest

Step-by-step explanation:

In a population of 400,000 people, 160,000 are infected with a virus. After a person becomes infected and then recovers, the person is immune (cannot become infected again). Of the people who are infected, 4% will die each year and the others will recover. Of the people who have never been infected, 15% will become infected each year. How many people will be infected in 4 years

Answers

Answer:

Number of people that will be infected in 4 years is 252,610.

Step-by-step explanation:

The number of people that will be infected in 4 years can be calculated as follows:

Number of people that will be infected in year 1 = 160,000

Number of people that will not be infected in year 1 = 400,000 - 160,000 = 240,000

Number of people that will be infected in year 2 = Number of people that will not be infected in year 1 * 15% = 240,000 * 15% = 36,000

Number of people that will not be infected in year 2 = Number of people that will not be infected in year 1 - Number of people that will be infected in year 2 = 240,000 - 36,000 = 204,000

Number of people that will be infected in year 3 = Number of people that will not be infected in year 2 * 15% = 204,000 * 15% = 30,600

Number of people that will not be infected in year 3 = Number of people that will not be infected in year 2 - Number of people that will be infected in year 3 = 204,000 - 30,600 = 173,400

Number of people that will be infected in year 4 = Number of people that will not be infected in year 3 * 15% = 173,400 * 15% = 26,010

Therefore, we have:

Number of people that will be infected in 4 years = Number of people that will be infected in year 1 + Number of people that will be infected in year 2 + Number of people that will be infected in year 3 + Number of people that will be infected in year 4 = 160,000 + 36,000 + 30,600 + 26,010 = 252,610

V100 is rational or irrational?​

Answers

Answer:

V100 is irrational I think

Step-by-step explanation:

Bütünler iki açıdan büyük olanın ölçüsü küçük olanın ölçüsünün 4 katından 10°eksiktir. Buna göre büyük açı kaç derecedir?​

Answers

Answer:

Step-by-step explanation:

x+y = 360

y = 360-x

x = 4y-10

x = 4(360-x)-10

x = 1440-4x-10

5x = 1430

x = 286°

Answer:34

Step-by-step explanation:

I need very urgent help with this

Answers

Answer:

-5, -2, -1, 2

Step-by-step explanation:

You can find the answer by trying the given possible answers out.

What is the value of
y in the equation?
2y - 3/3 - 3= 2y/5
​

Answers

Answer:

Solve for  y  by simplifying both sides of the equation, then isolating the variable.

Exact Form:

y  =  5 /2

Decimal Form:

y  =  2.5

Mixed Number Form:

y  =  2  and 1 /2

Step-by-step explanation:

Hope this helps! Have a great day!

Answer:

Solve for  y  by simplifying both sides of the equation, then isolating the variable.  

y  =  2  and 1 /2

Step-by-step explanation:

Hope I helped! Check out my profile and give a "thanks" for more answers!



PLEASE HELP !! ILL GIVE BRAINLIEST *EXTRA POINTS*..
IM GIVING 50 POINTS !! DONT SKIP :((.

Answers

Answer:

Step-by-step explanation:

m= 25 and b= 450

y= 25x+450

I believe proportional

positive slope

please correct me if I am wrong

Find the area of this circle. Use
3.14 for a
68 mm
The area of the circle is about mm?
(Round to the nearest hundredth as needed.)

Answers

Answer:

(3.14)(68)^2=14519.40mm^2      if 68mm is the radius

Step-by-step explanation:

how many years will it.take 10,000 to grow 17,800 if it is invested at 2.50% compounded continuously

Answers

Answer:

just about 24 years

Step-by-step explanation:

a number y divided by 6 is no more than 2​

Answers

Try 2 if i am wrong then please do correct me

Answer:

2

Step-by-step explanation:

cathe scores 15 points fewer than charles who scores 35 points. Karla scores half as many poinst as Cathe. How many points does charles score?​

Answers

Answer:

Your answer is.....

Cathe score = 20 points

Charles score = 35 points

Karla score = 10 points And

I score = 5 points

Mark it as brainlist answer . follow me for more answer.

Step-by-step explanation:

A car dealer sells four model types: A,B,C,D. On a given week, this dealer sold 10 cars of model A, 5 of model B, 8 of model C and 3 of model D. The selling prices of each automobile are respectively $12,500, $11,800, $15,900 and $25,300.
Represent the data on the quantity sold using using matrix.

Answers

Answer:

its latter A

Step-by-step explanation:

i hope its help

if x=2, y=3 and z=1 then find the value of

1/2 x + 3/4 y

Answers

2+2=20200303040999op

If sheeren had 7 friends and lost two how much would she have?

Answers

Answer:

sheeren would have 5 friends

Step-by-step explanation:

PLS HELP ASAP GIVING 35 POINTS... If a rock has a mass of 1.5 - g / mL and displaces 5-mI. of water, what is the mass of the rock?

Answers

The answer is 4.5 grams(:

Triston is playing basketball, and has 13 ounces of water in his water bottle. At half-time, he drinks ⅔ of his water. Later, he pours 3 ounces of water on his head to cool down. How much water does Triston have left in his bottle after the game?

Answers

Answer:

he has 5 ounces left in his bottle

The mayor of a town has proposed a plan for the annexation of a new bridge. A political study took a sample of 900900 voters in the town and found that 377% of the residents favored annexation. Using the data, a political strategist wants to test the claim that the percentage of residents who favor annexation is over 344%. Testing at the 0.020.02 level, is there enough evidence to support the strategist's claim

Answers

Answer:

Hence, we fail to reject the null ;

There is no significant evidence to support the claim that the percentage of residents who favor annexation is over 34%

Step-by-step explanation:

Given that :

Sample size, n = 900

p = 0.37

p0 = 0.34

H0 : p = 0.34

H1 : p > 0.34

Right tailed test:

Decision region:

Reject Null if ;

Zstatistic > Zcritical

Zcritical at α 0.02 = 2.05

Hence

Reject H0 : if Zstatistic > 2.05

Zstatistic = (p - p0) / sqrt((p0(1-p0))/n)

= (0.37 - 0.34) / sqrt((0.34(1-0.34))/900)

= 1.8999

1.8999 < 2.05

Zstatistic < Zcritical

Hence, we fail to reject the null ;

There is no significant evidence to support the claim that the percentage of residents who favor annexation is over 34%

Enter the value of 21 + (-3) - (-0.9).
PLSS

Answers

Answer:

18.9

Step-by-step explanation:

21+(-3)-(-0.9) = 21-3+0.9 = 18+0.9 = 18.9

7 - 14 - (-7) = 7 + (-14) +

Answers

Answer:

7 + (-14) + (7)

Step-by-step explanation:

7 - 14 - (-7) =

Subtracting is like adding a negative and subtracting a negative is like adding a postive

7 + (-14) + (7)

Find the slope of the line

Answers

Answer:

Unrefined

Step-by-step explanation:

If the line is straight, that means it's undefined

(x^8+2x^4+1)+(2x^4+x^2+1)

Answers

Your problem → (x^8+2x^4+1)+(2x^4+x^2+1)

(x^8+2x^4+1)+(2x^4+x^2+1)

=x^8 + 2x^4 + 1 + 2x^4 + x^2+1

=x^8+2x^4+2x^4+x^2+1+1

=x^8+4x^4+x^2+2

HELP- PLSS i beggggggg

Answers

Answer:d) 40 students

for the second one, it would be 26.

Step-by-step explanation:

the correct answer is D. 40 students.

How can you tell how many solutions a linear equation will have by looking at the equation?

Answers

Answer:

A system of two equations can be classified as follows

Step-by-step explanation:

If the slopes are the same but the y-intercepts are different, the system has no solution. If the slopes are different, the system has one solution. If the slopes are the same and the y-intercepts are the same, the system has infinitely many solutions.

Find the value of x. Round to the nearest tenth.

Answers

Answer:

x = 22.1°

Step-by-step explanation:

Angle ∠A = 41.124° = 41°7'26" = 0.71775 rad

Angle ∠B = 22.075° = 22°4'31" = 0.38528 rad

Angle ∠C = 116.801° = 116°48'4" = 2.03856 rad

a company declared a dividend of $1.50 per share. john has 600 shares in the company. how much will she get?​

Answers

Answer:

$900

Step-by-step explanation:

So if each individual share is $1.50 we can presume that we need to multiply both factors. 1 x 600 is 600 and .50 x 600 is 300. 600 + 300 = 900. John will get $900 in shares profit.

How can square roots be written so that the radicand has no square factors?

Answers

Answer:

You can do this by dividing the radicand by the square number , and multiplying the radical by the root of that number.

e.g.

[tex]\sqrt{96} \\= \sqrt{16 \times 6}\\= 4\sqrt{6}[/tex]

Instant brainliest please help.

Answers

Answer:the second one

Step-by-step explanation:

The second one is the answer

I need the answer ASAP

1. In the figure, x is an exterior angle to the triangle below.

(a) Explain why x is equal to the sum of the measures of the two nonadjacent interior angles. You need to present the algebra that proves this theorem.
(b) What is m

Answers

Answer:

109 is the correct answer of this question

find the sum:
4/100 + 6/10
​

Answers

Hello there, and welcome to Brainly!

In the following, you are adding the fractions together. Remember that, when adding or subtracting fractions, the denominator (bottom number in the fraction) must be the same. What you do to the denominator, you must do to the numerator as well.

Multiply 10 to both the numerator and denominator of the second fraction:

(6/10) * (10/10) = 60/100

Add across:

4/100 + 60/100 = 64/100

64/100 is your answer.

~

What is the value of the expression 5x – x + 8 when x = 2?

Answers

Answer:

16

Step-by-step explanation:

5x - x + 8

5(2) - 2 + 8

10 - 2 + 8

8 + 8

16

The answer is 16 I am sure

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