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

Write an equation for it:
Five times the difference of twice a number and three, decreased by the sum of the number and eight, equals to 13

Answers

Answer:

2x+3 times 5 - x +8=13

Step-by-step explanation:

off ion know

HELPPPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!

Answers

Answer:

Length = 6 inches

6 inches it in the picture

Three times the sum of a number and nine is 12. Find the number.

Answers

Answer:

7

Step-by-step explanation:

3x+9=12

3x=21

x=7

Answer:

[tex] - 5[/tex]

Step-by-step explanation:

[tex]3(x + 9) = 12[/tex]

the perimeter of a square is 7.2 meters how long is each side ?

Answers

Answer:

1.8 meters

Step-by-step explanation:

7.2÷4= 1.8

Answer:

1.8 m

Step-by-step explanation:

let side be 'a'.

perimiter of a square = 4(a)

7.2 = 4(a)

7.2/4 = a

therefore, a = 1.8 m.

What is the distance in units,from point j to point k

Answers

Answer: 15.

Step-by-step explanation: You have to use the distance formula which is [tex]\sqrt{(x\\_{2} -x_{1})^{2} + (y_{2} - y_{1} )^{2}[/tex]. [tex]x_{1}[/tex] means the x in the first point, so on and so forth. You just plug in and don't forget to take the square root of the number you get!

Please tell me if its right. Thanks!

if I had 10 cookies and promised my friend to give them 2 how many cookies will i have

Answers

Answer:

8 cookies

Step-by-step explanation:

edit one:the answer was 10 cookies, so please go give the person who said 10 cookies first some thanks/brainliest.

edit two:https://brainly.com/app/profile/31525083 is the user who got it first. Check comment if you are gonna say they didn't.

Answer:

8 cookies

Step-by-step explanation:

Well, we can use simple subtraction to answer this problem. You have 10 cookies, and you give away 2, you need to subtract 10 cookies by 2:

10 - 2 = 8

Therefore, you will have 8 cookies left.

Hope this helps :)

slope = 1, goes through the point (0,6)

Answers

Y=1x+6 or y = x+6
Y=Mx+b
M=1
6=1(0) +b
b= 6

The equation p=8.65h gives the amount p (in dollars) of pay a clerk receives for working h(hours)

Answers

Answer:

the clerk will make $8.65 an hour

Step-by-step explanation:

Answer:

P is the dependent variable, H is the independent variable

Step-by-step explanation:

An airplane moves at a constant speed of 120 miles per hour for 3 hours. How far does it go?

Answers

Answer:

360 miles

Step-by-step explanation:

Step 1: 120 miles*3 hours

Step 2: 360 miles far.

Write the point-slope form of the equation for a line that passes through (6,-1) with a slope of 2.
The value of xı is
The value of y, is
The point-slope form of the equation is

Answers

Answer:

value of x is=6

value of y is= -1

point-slope form= y-(-1)=2(x-6) or y+1=2(x-6)

Step-by-step explanation:

Which set of side would make a right triangle?
A. 8,10,12
B. 5,12,13
C. 4,5,6
D. 5,10,12

Answers

not c, i think its b
it would be answer b because using the Pythagorean theory (a^2+b^2=c^2), the only true answer would be 5,12,13
hope this helps :)

Is 3 a factor of 14t-20?

Yes

No

Answers

Answer:

No

Step-by-step explanation:

I dont really know

No, 3 is not a factor of 14t-20

Fifty students were eating lunch in the school cafeteria. The ratio of boys to girls was 25:25. Mrs. White asked Kym to explain what that ratio meant. Kym said it meant that 25% of the students in the cafeteria were boys.


Explain why Kym is incorrect.

Answers

Answer:

Kym is wrong because instead of 25% it would be 50 percent

Step-by-step explanation:

Answer:

Sample Response: The ratio of boys to total students was 25:50. Written as a fraction, this is 25/50. Rewrite the fraction with a denominator of 100 to 50/100. So 50% of the students were boys.

You might wanna change up some words so the teacher doesn't know your cheating lol

Solve for p.

98 = 4p + 38

Answers

Answer:

P=15

Step-by-step explanation:

Answer:

P=15

Step-by-step explanation:

first:

98-38=60

4p=60

60÷4=15

P=15

hope that helped :)

PLEASE HELP ME
Find the total surface area of the figure shown.

Answers

Answer:

I think it's C but I might be

Step-by-step explanation:

1. On a trip to Oregon, Sabrina bought a small stone in
the shape of a square pyramid as a souvenir. Determine
the volume of the stone. Round to the nearest tenth.
V-bh(h)
2 in.
121.5 in.
1.5 in.​

Answers

Answer:

The answer is "[tex]\bold{1.5\ in^3}[/tex]"

Step-by-step explanation:

Please find the complete question in the attached file.

Given:

[tex]l=1.5 \ in\\\\ w=1.5 \ in\\\\h= 2 \ in\\\\[/tex]

The formula for calculating volume:

[tex]\to V=\frac{lwh}{3}[/tex]

        [tex]= \frac{2 \times 1.5 \times 1.5}{3}\\\\=\frac{4.5}{3}\\\\=1.5 \ in^3[/tex]

If the time is 2:12 pm then how many minutes ago did the time turn to noon

Answers

Answer:

132min (mark brainliest?)

Step-by-step explanation:

noon = 12pm

2:12pm - 12pm = 2 hours and 12 min

2 hours *( 60 min) = 120 min

120 min + 12 min = 132 min

What is the value of q in the solution to this system of equations?
2m-5q=8
4m+2q=64
A.4
B.6
C.9
D.14

Answers

Answer:

4

Step-by-step explanation:

M,q 14,4

The value of q in the system of equations 2m-5q=8 and 4m+2q=64 is 4 thus option (A) is correct.

What is the equation?

There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.

As per the given system of equations,

2m-5q=8

4m+2q=64

Multiply by 2 into the equation 2m - 5q = 8

4m - 10q = 16

Subtract 4m - 10q = 16 by 4m+2q=64

-10 - 2q = 16 - 64

-12q = -48

q = 4

Hence"The value of q in the system of equations 2m-5q=8 and 4m+2q=64 is 4".

For more about the equation,

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Logan took out a $600 loan 2 years ago. He paid back $690. This included the original loan amount and the interest charged to him. What was the annual interest paid Logan paid? Show all work or explain in detail how you got your answer.

Answers

Answer:

$45 dollars a year i think

can anyone help with this?

Answers

The answer is B. because 0.09 would the youngest, 30% transfers to 0.3 which would be the second youngest, 1.98 would be the third youngest, and the square root of 9 is 3, which would be the oldest.

1) How is unit rate related to slope or rise over run?

Answers

The unit rate is a ratio of change in y and into the change on x. It can also be the rise to run or the slope.

Jacob has 17 yards of fabric. He uses 1 third of it to make a cape. How many yards of fabric does Jacob use for the cape? zearn m4L7

Answers

Answer:

5 2/3

You multiply.

A sea turtle descends 28 feet from the surface of the ocean and then ascends 5 feet. Then it descends 9 feet and repeats this descent 4 times. How many feet below the surface is the turtle then ?

Answers

Answer: 59 feet

Step-by-step explanation:

First the sea turtle descended 28 feet.

It then ascends 5 feet which means it is now:

= 28 - 5

= 23 feet below surface

It then descends 9 feet and repeats that descent 4 time:

= 9 * 4

= 36 feet below the surface

Total distance below the surface:

= 23 + 36

= 59 feet

f(x) = 3x + 8
fl-1) = ?

Answers

3(-1)+8=5
The answer is x=5

9) using opposite operations, solve for m

4m+8=12

Answers

Answer: 1

Step-by-step explanation:

4m + 8 = 12

=> 4m = 4

=> m = 1

Answer:

Subtract 8 from both sides now your left with 4m and 4. Divide 4 from both sides to get 1. 1 is your answer

What is the domain of the function represented by the graph?
4
1
2-+
X
-2
TUL
NELL
A. X54
OB. all real numbers
C.
X20
OD
OsXs4

Answers

Answer:

Option C x>0

GOOD LUCK FOR THE FUTURE ! :)

All real numbers (In interval form (-∞,∞) )

What is domain?

The domain of a function is the set of values that we are allowed to plug into our function. This set is the x values in a function such as f(x). This set is the values that the function shoots out after we plug an x value in.

here, we have,

Given,

From the graph,

To find the domain of the function.

Now,

We know that a domain of a function is the set of the all the x-values for which the function is defined.

By looking at the graph of the function we see that it is a graph of a upward open parabola and the graph is extending to infinity on both the side of the x-axis this means that the function is defined all over the x-axis i.e. for all the real values.

Also, we know that the function will be a quadratic polynomial since the equation of a parabola is a quadratic equation and as we know polynomial is well defined for all the real value of x.

The domain of the function is:

Hence,  All real numbers (In interval form (-∞,∞) )

Learn more about Domain at:

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Really confused with this one it is related with similar triangles please help

Answers

Answer:

x=20

y=70/3 which is about 23.3

Step-by-step explanation:

Write a proportion of all similar sides

what 2 numbers multiply together to equal 15, and add together to equal 8?

Answers

Answer:

7.5 x 2

4 + 4

Step-by-step explanation:

7.5 x 2 = 15

4 + 4 = 8

hope i helped you!

If using the method of completing the square to solve the quadratic equation
22 + 15x – 11 = 0, which number would have to be added to "complete the
square"?

Answers

Answer:

Step-by-step explanation:

Let's solve your equation step-by-step.

22+15x−11=0

Step 1: Simplify both sides of the equation.

22+15x−11=0

22+15x+−11=0

(15x)+(22+−11)=0(Combine Like Terms)

15x+11=0

15x+11=0

Step 2: Subtract 11 from both sides.

15x+11−11=0−11

15x=−11

Step 3: Divide both sides by 15.

15x

15

=

−11

15

x=

−11

15

Answer:

x=

−11

15

For a theater play, the school sold 120 blue tickets for students and 80 red tickets for adults. What percent of the tickets were sold to students?

Answers

Answer:

Step-by-step explanation:

120+80=200 the total number of tickets

120(student tickets) ÷ 200 (total tickets)= .6 =60%

Answer:

bin

Step-by-step explanation:

bghgghhshshsbabbsnajswjjegvrjrjrhrbrhrriritt

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