An equation and the first step in its solution are shown: Equation: x2 + 8x - 9 = 0
Step 1: x2 + 8x +____ = 9+____
What number should be put in the____ to solve the equation by the method of completing the square?
A. 16
B. 12
C. 8
D. 4​

Answers

Answer 1
Answer- A-16

Because when doing completing the square, you divide the coefficient of x by 2, which is 4, and the square it which is 16

Related Questions

-6, 12 ,-24 ,48 what would be the next term in this sequence (help ASAP please )

Answers

the next term would be -96 ! your just adding the term twice and alternating it by making it a negative and a positive

On the morning of the sale, the store donated 50 pairs of shoes to a homeless shelter. Then they sold 64% of their remaining inventory during the sale. If the store had 288 pairs after the donation and the sale, how many pairs of shoes did they have at the start? how many shoes did they have at the start?

Answers

Answer:

850.

Step-by-step explanation:

Let the number at the start be x shoes. Then:

x - 50 - 0.64(x - 50) = 288

x - 0.64x - 50 + 32 = 288

0.36x = 288 + 50 - 32

0.36x = 306

x = 306/0.36 =  850.

Answer:

850 is the answer to the question

WILL MARK YOU BRAINLIEST SHOW WORK PLZ

Answers

Answer:

5) because ABCD is a rectangle => AC = BD

<=> 4x - 5 = 3x - 1

<=> 4x - 3x = -1 + 5

<=> x = 4

6) because EFGH is a rhombus

=> HF is the bisector of the angle EHG

=> EHF = GHF

<=> 3x - 15 = 2x + 9

<=> x = 24

The grocery store had 4lb bag of oranges for 4.80$ and a 6lb bag for 6.18$ . What is the difference of the 4lb bag of oranges and the 6lb bag of oranges

Answers

Answer:

$1.38

Step-by-step explanation:

The grocery store had 4lb bag of oranges for 4.80$ and a 6lb bag for 6.18$ . What is the difference of the 4lb bag of oranges and the 6lb bag of oranges

The cost difference is calculated as:

Cost of 6lbs of oranges - Cost of 4lbs of oranges

Cost of 6lbs of oranges = $6.18

Cost of 4lbs of oranges = $4.80

Hence,

= $6.18 - $4.80

= $1.38

4(x-3)=20
GUYSS I NEED HELP

Answers

4x+12=20
-12 -12
4x=8
4 4
X=2

Step-by-step explanation:

simplify the bracket

4x-12=20

4x=20+12

4x=32

X=8

Find the next three terms of the following arithmetic sequence
Please help

Answers

Answer:

the 2nd option

Step-by-step explanation:

Hi everyone,Can someone please help me please please I really really need help please answer it correct

Answers

Answer:

0<x<3

4<x<6

9<x<10

..........

Answer:

Hope it helps you

Step-by-step explanation:

Decreasing: A function is decreasing, if as x increases (reading from left to right), y decreases. In plain English, as you look at the graph, from left to right, the graph goes down-hill. The graph has a negative slope

So in given graph ,

Decreasing interval are ,

1)   9<x<10

2)  0<x<3

I done it using above definition you also check it from any other source and confirm it ..

Cody leaves his home and cycles 5y miles south, then cycles (2y + 10) miles east. Finally, he cycles (4y + 8) miles south and reaches his school. How far does Cody cycle (in terms of y)?

Answers

Answer:

11y + 20

Step-by-step explanation:

Given that:

Distance south = 5y miles

East = (2y + 10) miles

Final = (4y + 8) miles

Total cycle in terms of y

Take the sum of the distances :

5y + 2y + 10 + 4y + 8

11y + 20

Katie answered 2/3 of a 15 problem math correctly. How many questions did Katie answer incorrectly?

Answers

2/3 of 15 is 10:)
so i believe she got 5 incorrect

8 dinosaurs in the valley eat meat and 40 dinosaurs in the valley eat vegetation. What is the unit rate of dinosaurs that eat vegetation to the total number of meat eating dinosaurs in the valley?

Answers

Answer:

5

Step-by-step explanation:

8 dinosaurs in the valley eat meat

40 eat vegetation

Therefore the unit rate of dinosaurs that eat vegetation to those that eat meat can be calculated as follows

= 40/8

= 5

Which of the following equations represent exponential growth functions? Choose all that apply.
a) f (x)=4^x
b) f (x)=(1/4)^-x
c) f (x)=(2/3)^x
d) f (x)= (2.3)^x
e) f (x)=(.8)^x

Answers

Option:-

a) f(x) = 4^x is applicable

b) f(x) ={ (1/4)^-x = 4^x }is applicable

c.) f(x) = (2/3)^x is not applicable

d.) f(x) = (2.3)^x is applicable

e.) f(x) = (.8)^x is not applicable

Options (a), (b) and (d) are exponential growth functions.

What is Exponential function?

An exponential decay is in the form:

y = abˣ

where y, x are variables, a is the initial value of y and b is the multiplier which is less than 1.

By the Exponential decay form,

An exponential decay is in the form: y = abˣ

(a) f (x)=4ˣ is applicable as 4>1

(b) f (x)=(1/4)⁻ˣ is applicable as (1/4)-1=4>1

(c)  f (x)=(2/3)ˣ is not applicable because 2/3<1

d) f (x)= (2.3)ˣ is applicable as 2.3>1

e) f (x)=(.8)ˣ is not applicable, 0.8<1.

So options (a), (b) and (d) are applicable for exponential growth functions.

To learn more on exponential functions click:

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im putting all the questions in one to make it easier

Answers

I'll focus on problem 19 and problem 22

============================================================

Problem 19

Answers:

x = 87x+15 = 102

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

Explanation:

The horizontal lines are parallel. Note the arrow markers along the interior portion of the lines. These similar markers tell us how the lines pair up to be parallel to one another.

Since the horizontal lines are parallel, this means the angles in question are congruent. They are corresponding angles.

x+15 = 102

x = 102-15

x = 87

Which leads to

x+15 = 87+15 = 102

============================================================

Problem 22

Answer: y = 27

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

Explanation:

We have a pair of alternate exterior angles. They are congruent due to the parallel lines.

Let's solve for y.

7y-55 = 3y+53

7y - 3y = 53+55

4y = 108

y = 108/4

y = 27

PLEASE HELP (don't put fake answers !!)

Answers

Answer:

=33.55 m^2

Step-by-step explanation:

The area of the trapezoid is

A = 1/2 a(b+c)  where a is the height and b and c are the bases

A = (1/2 *5.5)(5+7.2)

   = 2.75(12.2)

   =33.55 m^2

Answer:

i resubmitted my Persuasive Argument: Letter to Gov. Abbott Choice

Step-by-step explanation:

Given the graph of the function F(x) below, what happens to F(x) when x is a
very small positive number?
A. FX) is a very small positive number
B. F(x) is a negative number with a large absolute value
C. F(x) is a very large positive number
D. F(x) is a negative number with a small absolute value

Answers

Answer:

B. F(x) is a negative number with a large absolute value.

Step-by-step explanation:

The Y and X axes in this case are asymptotes, it means that the function will never touch them. When x is negative and is so small, the function tends to negative infinity, because the function try to cut it but it will never happen.

Please help this is due

Answers

Answer:

f(6) = 0

x = 3 when f(x) = 2

Step-by-step explanation:

f(6) = -2/3(6) + 4

f(6) = -4 + 4

f(6) = 0

2 = -2/3x + 4

-2 = -2/3x

-2x = -6

x = 3

What is 4w -7 = 6w + 31 ?

Answers

Answer:

w = -19

Step-by-step explanation:

Move the 6w to the left and 7 to the right.

4w-6w=31+7

Combine like terms

-2w=38

Divide by negative 2.

w=-19

4w - 6w = 31 + 7
-2w = 38
-2w/-2 = 38/-2
w = -19

please please help, if you could show work too that would be amazing!

Answers

Answer:x=75

Step-by-step explanation:

They are opposite of eachother so they are equal to eachother

2x= 130

x= 75

Simplify the expression: (7x + 4)(2) = ​

Answers

Answer:

14x+8

Step-by-step explanation:

pls answer i need the answer

Answers

Answer:

(-2,5)

Step-by-step explanation:

4x+4y=12

6x-4y=-32

10x=-20

x=-2

4(-2)+4y=12

-8+4y=12

4y=20

y=5

What is an equation of the line that passes through the points (6, 8)(6,8) and (-3, 2)(−3,2)?

Answers

Answer:

Hi how are you doing today Jasmine

Can someone please help me with this?

Answers

it would be the second option

plz answer only if you know ur correct. the best answer gets brainliest

Answers

Answer:

b and e are correct and f maybe

Step-by-step explanation:

Five students each wrote an expression to represent the perimeter of the given rectangle. Terrell wrote this correct expression: (2x + 2x) + (5x + 5x) + (1 + 1). Circle the name of the student who wrote an incorrect expression. Explain why the expression is incorrect. Anya: 2x + 2x + 5x + 1 + 5x + 1 Katrin: 2(5x + 1) + 2x Luis 2(2x) + 2(5x + 1) Steve: 1 + 1 + x(2 + 2 + 5 + 5)​

Answers

Answer:

Luis wrote an incorrect expression.

Step-by-step explanation:

As per Terrell, the correct expression is (2x+2x) + (5x+5x) + (1+1) which is equal to 12x + 2

For you who got incorrect answer, the answer if you simplified it must be 12x + 2. Let's check:

Anya     2x+2x+5x+1+5x+1 =

            12x + 2 [CORRECT]

Katrin    2(5x+1) + 2x

             10x+2+2x

             12x + 2 [CORRECT]

Luis       2(2x) + 2(5x+1)

             4x+10x+2

             14x + 2 [INCORRECT]

Steve     1+1+ x(2+2+5+5)

              2+ x(12)

             12x + 2 [CORRECT]

If the m<5 is 63 degrees , find the measure of <3

Answers

Answer:

Diagram manditory

GOOD LUCK FOR THE FUTURE! :)

Rewrite 48+40 using the distributive property with the greatest common factor located in front of the parentheses

Answers

Answer:88

Step-by-step explanation:

Find the missing angles

Answers

Answer:

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why is math your favorite subject

Answers

Answer:

its nice

Step-by-step explanation:

Answer:

It's easier for me than other subjects. Have an amazing rest of ur day.

Step-by-step explanation:

HOW DO YOU WRITE THIS IN A SYSTEM OF EQUATIONS?

Answers

Answer:

2x+105=-3x+130

Oliver thinks of a number.
He multiplies this number by 4.
He then subtracts 5.
The result is 23.
What number did Oliver think of?

Answers

Answer:

7

Step-by-step explanation:

Add 5 to 23 which gives you 28

Then divide 28 by 4 and you get 7

Hope this helps!

The ratio of boys to girls in a class is 2:3
Ben says there are 28 students in the class.

(a) Explain why Ben must be wrong

(b) Write down a possible number of students in the class

Answers

Step-by-step explanation:

A: adding together 2 and 3 a bunch of times (2+3+2+3+2+3 etc) does not equal 28.

A possible answer could be 27 students.

The requried,
(a) Ben is wrong because the number of students is incorrect,
(b) The required possible number would be either 25 or 30.

What is the Ratio?

The ratio can be defined as the comparison of the fraction of one quantity towards others. e.g.- water in milk.

here,
As mentioned in the question, the ratio of boys to girls in a class is 2:3

Ben says there are 28 students in the class.


So total of the ratio = 2 + 3 = 5
Now calculate number of boys = 2 / 5 [28] = 7.2 [this is not possible]
So the total number of students must be that number which is divisible by 5 and nearby 28, so the number would be 25 or 30.

Thus, the requried,
(a) Ben is wrong because the number of students is incorrect,
(b) The required possible number would be either 25 or 30.

Learn more about Ratio here:

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Mary has 20 biscuits in a tin there are 11 plain biscuits 7chocolate biscuits 2 currant biscuits sue takes at random 2 biscuits from the tin work out the probability that the 2 biscuits were not the same type? Kyle found that 31/97= 0.3196. Without doing any computation, explain how we know that Kyle is wrong? Please answer! I will give Brainliest the first and correct answer. Make sure to include an explanation! who is this Claudette Colvin A molecule that has regions of partial positive and partial negative chargeA) polarB) hydrogen bondC) surface tension D) universal solventE) adhesion 1.How will you determine the center and radius given the equation of the circlein standard form? in general form?2.How will you determine the equation of the circle given the center and radius ? Jennifer gets tired of waiting for her brothers to finish playing golf. She presses on the pedal of the golf cart and it starts to move. Which of the following explains how the golf cart is able to move? Electrical energy stored in the battery is transformed to mechanical energy that moves the cart. Mechanical energy from Jennifer's foot is transformed to electricity that moves the cart.Light energy absorbed from the Sun is transformed to electrical energy that moves the cart.Sound energy created by the cart is transformed to heat energy that moves the cart forward. HELP I AM TIMED!In which ways were Franklin D. Roosevelt and Harry S. Truman similar? Select two options.Both men were presidents during World War II.Both men represented the US at the Yalta Conference.Both men represented the US at the Potsdam Conference.Both men met with Allied leaders to plan for the end of the war.Both men issued declarations demanding Japans unconditional surrender. Bonjour, Please help me. Merci! A food truck sells hamburgers and hotdogs in the ratio of 5 to 8, i.e. for every 5 hamburgerssold, 8 hotdogs are sold. On a given day, there were 21 more hotdogs sold than hamburgers. How many of each were sold. Use a tape diagram. Which of the following is NOT an element of style? A.tone B.word choice C.sentence structure D.plot Naomi and Hudson work at a dry cleaners ironing shirts. Naomi can iron 35 shirts per hour, and Hudson can iron 20 shirts per hour. Naomi and Hudson worked a combined 13 hours and ironed 395 shirts. Write a system of equations that could be used to determine the number of hours Naomi worked and the number of hours Hudson worked. Define the variables that you use to write the system. Put the words in order and write correct sentences. Remember to write the correct form of the verb ir. 1. a la escuela/ t/ el sbado/ ir 2. a la tienda de msica/ t y yo/ hoy/ ir3. tus primos/ a la zapatera/ ir Which of the following statements is true, based on the data in the chart above?A.Niger has twice as many births as deaths per 1,000 people, but the life expectancy is only 52.6, resulting in a young median age.B.Nigers life expectancy is only 52.6 years; therefore, the country must have a young median age.C.Niger has more deaths than births per 1,000 people, resulting in a young median age.D.Only 16% of Nigers population lives in urban areas, limiting access to quality healthcare. Ricardo bought $46.23 worth of groceries and paid with a $100 bill. How much change did he receive? Which best describes the reflection? It took Mariel two hours to complete 13 pages in a workbook she completed 7 1/2 pages in the first hour how many pages does he complete in the second hour Find the value of x.A. 45B. 25C. 15D. 25 Calcula el area de un triangulo rectngulo en el cual los catetos miden 22m y 16m Fill in the blanks to make the equation true. ___ r x r = p PLEASE HELP!!!Which list correctly identifies characteristics that protists share with animals? A. Motile, Reproduce sexually, PhotosyntheticB. Motile, Multicellular, PhotosyntheticC. Motile, Eukaryotic, Reproduce SexuallyD. Motile, Prokaryotic, Multicellular