Find the number that should be added to the equations to make it a complete squares.

1. x^2 + 22x
2. x^2 - 2x
3. x^2 + 7x

Answers

Answer 1

The number that must be added to complete the squares is 121 .

Since x² represents the area of a square with a side of length x and bˣ represents the area of a rectangle with sides b and x, the process of completing the square can be seen as a visual manipulation of rectangles.

When the x² and bˣ rectangles are simply joined into a larger square, a corner is lost. The expression (b/2)² can be added to each side of the equation above to calculate the area of the remaining corner, thereby giving rise to the idiom "completing the square".

the given expressions are x² + 22x

This can be written in the form of a square polynomial as :

x² + 2×x×11 + 11² = (x+11)²

Therefore we have to add 11² = 121 to the polynomial to complete the square.

Similarly for  x² - 2x we have to add 1 to get the form (x-1)²

And we have to add x²+ 7x + (7/2)²

Hence the number to be added is 49/4 .

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Related Questions

(-2.655)times(18.44)

Answers

-48.95820 is the result of the products of the decimal numbers (-2.655) and (18.44).

How to multiply decimal numbers?

Given the data in the question;

(-2.655) multiply by  (18.44)

First, we determine the total decimal places in the numbers.

We have 5.

Next, we ignore the decimal places and carry out the multiplication operation as if operating on two integers.

                                - 2 6 5 5

                ×                 1 8 4 4

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

                +              1 0 6 2 0

                +           1 0 6 2 0

                +        2 1 2 4 0

                +       2 6 5 5

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

               =      - 4 8 9 5 8 2 0

Now, rewrite the result of the product with the 5 total decimal places.

= -48.95820

Therefore, the result of the multiplication operation is -48.95820.

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Each 1/4 cup of milk has 2 grams of protein. Exactly how many grams of protein are in 3 1/2 cups of milk?

Answers

Answer:

28

Step-by-step explanation:

1 0/4 = 8

2 0/4 = 16, so 3 0/4 = 24.

2/4 = 1/2, and 2/4 has 4 grams.

24 + 4 = 28.

A store sells pounds of almonds for $2.50. You need to buy 2 pounds. How much will you pay?

Answers

One pound of almonds = 2.5 and you need to buy two pounds

2(2.5) = 5

You will pay $5.

Hope that helped :)

Answer: It would be $5.00

I hope you have a nice day!

What’s the algebraic representation

Answers

The algebraic representation of the given figure is y = y₁ + 14, for B (x, y) and C (x ,y₁)

What is algebraic representation?

A module for an associative algebra is that algebraic representation in abstract algebra. In this case, an associative algebra is a ring, which need not be unitary.

If the algebra is not unitary, it can be made to be so using a standard method (see the adjoint functors page); there is no fundamental difference between the algebraic representations and the modules for the resulting unitary ring, in which the identity acts through the identity mapping.

Point A in both triangles are same

For Point B(-2,8) and Point C(-2, -6)

we can see Point B y = Point C y+14

So the algebraic representation is Point B(x, y) =  Point C (x ,y+14)

As x is same we get

y = y₁ + 14

Where y is point B y and y₁ is point C y,

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A triangle has a 45° angle and two sides 8 centimeters in length.Select True or False for each statement about this type of triangle.True FalseThe triangle might be an equilateral triangle.The triangle must be a right triangle.The triangle might be an acute triangle.

Answers

Answer

The triangle might be an equilateral triangle.

False

The triangle must be a right triangle.

False

The triangle might be an acute triangle.

True

Explanation

First of, we will explain the different types of triangles that exist based on side lengths and angle measures respectively,

Based on side lengths,

- Scalene triangle has none of its three sides having the same length as another. All the three sides have different lengths. To use angle to know this, all the three angles of a Scalene triangle have different values.

- Isoscelles triangle has two of its sides with the same lengths. In terms of angles, an Isoscelles triangle has two of its angles equal to each other.

- Equilateral triangle has all of its sides equal to one another. In terms of angles, all of the angles of an Equilateral triangle are equal to one another. Each of the angle is equal to 60°.

Based on angle measures,

- Acute triangle has all of the angles in the triangle being less than 90 degrees.

- Right angle triangle has one of the angles in the triangles being equal to 90 degrees.

- Obtuse triangle has one of the angles in the triangle being greater than 90 degrees but obviously less than 180 degrees.

So, a sketch of the triangle described would look like

So, we can see that the triangle has two sides equal, hence, the two base angles will be equal to.

If we call those base angles, x,

x + x + 45° = 180°

2x = 180° - 45°

2x = 135°

Divide both sides by 2

(2x/2) = (135°/2)

x = 67.5°

Three angles of the triangle are 45°, 67.5° and 67.5°

So, taking the statements one at a time now

The triangle might be an equilateral triangle.

This statement is False since it is evident that all the angles of this triangle are not equal to one another, hence, the sides cannot all be equal too.

The triangle must be a right triangle.

This statement too, is False. None of the angles of the triangle is equal to 90°.

The triangle might be an acute triangle.

This statement is True. All of the angles of the triangle are less than 90°.

Hope this Helps!!!

25. (a) During an outing, of the students carried juice, of the remainder used water and the rest soft drink. What fraction of the students used soft drink? Answer... ...(2) (b) If 8 students drank water, how many students drank soft drink?​

Answers

Answer:Eureka Math Grade 6 Module 2 Lesson 1 Answer Key

March 31, 2021 / By Prasanna

Engage NY Eureka Math 6th Grade Module 2 Lesson 1 Answer Key

Eureka Math Grade 6 Module 2 Lesson 1 Example Answer Key

Example 1.

34 gallon of batter is poured equally into 2 bowls. How many gallons of batter are in each bowl?

Answer:

→ Since the whole is being put into 2 equal parts or bowls, this is the partitive model of division. What division expression can we write to match this story?

→ 34 ÷ 2

→ We can also think of this problem as asking, “3 fourths is 2 groups of what?” Let’s take a look at how to solve this using an area model. What is the whole? How much batter is being shared?

→ Three-fourths gallon

→ The story tells us that the batter is poured equally into 2 bowls. How can we show this in the model?

→ We can draw another line, horizontally, to partition the model into 2 equal units.

→ Now our model shows 3 fourths being partitioned into 2 equal parts. Could we also say that our model shows 12 of 3 fourths?

→ Yes, it’s just like in the Opening Exercise where dividing by 2 and multiplying by are the same.

→ Let’s label our model to show that. What is half of 3 fourths?

Half of 3 fourths is 3 eighths.

→ Yes, and what is 3 fourths divided by 2?

→ It’s also 3 eighths!

→ We said that we could also think of this problem as, “3 fourths is 2 groups of what?” Is it true that 3 fourths is 2 groups of 3 eighths? Use a repeated addition or multiplication sentence to support your response.

→ Yes, it’s true. 3 eighths plus 3 eighths is 6 eighths, which is equal to 3 fourths. →. It’s true.

2 × 38=68=34.

Eureka Math Grade 6 Module 2 Lesson 1 Example Answer Key 2

34 ÷ 2 = 12 of 34 = 38

38 gallon of batter in each bowl.

Step-by-step explanation:

A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77. How much was the tip in dollars? Round your answer to the nearest hundredth (second) decimal place. Do not include units ($) in your answer.

Answers

A family eats at a restaurant. The bill is $42. The family leaves a tip and spends $49.77. How much was the tip in dollars? Round your answer to the nearest hundredth (second) decimal place. Do not include units ($) in your answer

Subtract the bill from the total

so

49.77-42=$7.77

therefore

the answer is 7.77

Passes through the point of intersection of x-y=0 and x + y = 0 and (2, 2) find the equation of a straight line​

Answers

The equation of the line is x-y=0

What is point of intersection?

A point of intersection is a point where two lines intersect.

We are given the two equations as x-y=0 and x+y=0

The point of intersection can be given by finding the coordinates of which will satisfy both the equation

Now the equation can be solved by

The point of intersection is (0,0)

We have to find the equation of the line passing through the point (0,0),(2,2)

This can be done by

[tex]\frac{y-0}{0-2}=\frac{x-0}{0-2}[/tex]

[tex]\frac{-y}{2}=\frac{-x}{2}[/tex]

[tex]x-y=0[/tex]

Hence the equation of the line passing through the point of intersection of x-y=0 and x+ y=0 and (2,2) The equation of the line is x-y=0

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6) A package of pencils costs $1.29. How much would 13 packages
cost?
10 points

Answers

After conducting some mathematical operations, we know that the cost of 13 packages of pencils of $16.77.

What are mathematical operations?An operation is a function in mathematics that transforms zero or more input values into a clearly defined output value. The operation's arity is determined by the number of operands. A mathematical action is called an operation. Mathematical operations include addition, subtraction, multiplication, division, and finding the root.

So, the cost of 13 packages of pencils:

The cost of 1 package of pencils is $1.29.

Then, obtain the cost of 13 packages of pencils as follows:

13 × 1.29$16.77

Therefore, after conducting some mathematical operations, we know that the cost of 13 packages of pencils of $16.77.

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Give an example of a scatter plot with 6 points that has a correlation of r= -1 on the axesbelow. How do you know the correlation value is -1 without using a calculator

Answers

The Solution:

Required:

To give example of a scatter plot with 6 points and has a correlation of r = -1.

Below is the scatter plot:

Does the ordered pair (0,3) satisfy the following system of equations?-4x+4y=20-3x+4y=15

Answers

We are given the following system of equations:

[tex]\begin{gathered} -4x+4y=20,(1) \\ -3x+4y=15,(2) \end{gathered}[/tex]

we are asked to determine if the point (0, 3) is a solution of the equation. To do that, we will replace the points x = 0 and y = 3 in each of the equations to see if they are both satisfied:

Replacing in equation (1):

[tex]\begin{gathered} -4(0)+4(3)=20 \\ 0+12=20 \\ 12\ne20 \end{gathered}[/tex]

Since equation (1) is not satisfied by the point this means that this is not a solution.

1) Suppose that x and y vary inversely and that x=48 when y=3.
a) Write a function that models the inverse variation.
b) Find x when y=36.

Answers

A. The function that models the inverse variation is y = 144/x

b. The value of x when y = 36 is 4

What is an inverse variation?

An inverse variation simply shows the relationship between two variables whereby when one value increases, the other value will decrease

1. In this case, x and y vary inversely and that x=48 when y=3. The inverse relationship will be:

y = k/x

3 = k/48

Cross multiply

k = 48 × 3

k = 144

Therefore, y = 144/x

2. When y is 36, x will be:.

y = 144/x

36 = 144/x

Cross multiply

36x = 144

Divide

x = 144 / 36

x = 4

The value of x is 4.

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Write the sentence as an inequality.

1. A number n plus 7 is less than or equal to 9

2. Three times a number w is less than 18.

3. Three is less than the sum of a number s and 4

4. Four is no less than quotient of a number x and 2.1

Answers

Answer:

1. n + 7 ≤ 9

2. 3w < 18

3. 3 < s + 4

4. 4 ≥ x/2.1


The nth term of a sequence is given by
5n - 4
What is the 8th term of this sequence?

Answers

Answer is 36

The 8th term of this sequence is 36.

solution:

 A series of numbers known as a arithmetic sequence has a constant difference numbers such that the difference between the consecutive terms is constant.

The formula for nth term of an arithmetic sequence is = a + (n – 1)d

Pattern : 5nnth Term : 5n-4

        ie an= 5n-4

common difference : 5

n= number of terms

To find  8th term : 5(n)-4

                            : 5(8)-4 = 36

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which is a true statement about the slopes of MO and OQ?

Answers

Answer: b

Step-by-step explanation: because if u see the numbers and they match

8. A gem expert has three gemstones.
Their masses in grams are 0.809,
0.098, and 0.890. Which mass is
the greatest?

Answers

Answer:

the last one so it would be

0.890

Step-by-step explanation:

3. For what values of
x is f(x)g(x) – show your answer on a number line?

4. For what values of
x is f(x)<2?

Answers

Answer:

f(x) is -1 and g(x) is 2 this is because f(x) intersect at -1 which is x axis and g(x) intersect 2 which is y axis

I need answer not the steps ok the question is -35x = -105 is -3

Answers

ok the answer is 3

as both are negative so they will get cancel out

[tex]\begin{gathered} x=\frac{-105}{-35}=3 \\ x=3 \end{gathered}[/tex]

so the answer is 3 only.

someone pls pls PLS help




Write the equation in both slope-intercept and standard form for each of the
scenarios below.

Answers

Check the picture below.

standard form for a linear equation means

• all coefficients must be integers, no fractions

• only the constant on the right-hand-side

• all variables on the left-hand-side, sorted

• "x" must not have a negative coefficient

well, keeping all that in mind, the equation is already in standard form.

I AM GROUNDED FOR MY GRADE IN GEOMETRY PLEASE HELP

Answers

Answer: a = 35

Step-by-step explanation: The answer would be 35 because we already know one of the angles is 55 degrees and the other would be 90 degrees because the little square gives it away. Now, all you need to do is add 55 and 90 which would give you 145. Since the line is 180 degrees you would have to subtract 145 from 180 which would give you 35.

The side length, s, of a cube is 4x2 + 3. If V = s3, what is the volume of the cube?

Answers

Answer:

The side length, s, of a cube is 4x^2 + 3. If V = s^3, what is the volume of the cube? The volume of the cube is 64 x^6 + 144x^4 + 108x^2 + 27.

Step-by-step explanation:

Hope this helps you

Write an inequality for the graph shown below.
Use x for your variable.

Answers

Answer:

X > -5

if the bubble were shaded in, it would be >

Please help!!!
And please be accurate!!

Answers

Answer: ..

Step-by-step explanation:

Wed: 0%

Thu: 30%

Fri: 50%

Sat: 80%

Sun: 100%

I got these answers by taking 100, and subtracting the rain percentage from it. For instance, if it was a 45% to rain, and a unknown amount for it to not rain, I would take 100 and subtract 45 from it, resulting in a 55% chance of it not raining.

A $240 suit is marked down by 20%. Find the sale price.

Answers

First we have to calculate 20% of 240

Let's multiply 240 by 20/100, therefore the result is 48

Then we subtract 48 from 240, the result is 192

The answer is $192.

Please help me with these.

Answers

PAGE 1

1.) 5 x 7 + 5 x 3 = 50

2.) 3 x 3 + 3 x 4 = 21

3.) 2 x 8 + 2 x 8 = 32

4.) 6 x 8  - 6 x 5  = 18

5.) -3 x 9 - (-3) x 2 = (-21)

6.) -2 x 8 - (-2) x 4 = (-8)

PAGE 2

1.) 2 x 3 + X

2.) 5 x 6 + Y

3.) 7 x 8 + Y

4.) 9 x 2 - M

5.) 15 x 3 - S

6.) -15 x 6 - A

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6. What value is needed to complete the square?
x² - 6x +

Answers

The most appropriate choice for expansion will be given by -

9 is needed to complete the square.

What is expansion?

Expansion is used when there is a product of factors in an algebraic expression and multiplication of algebraic expansion is needed by removing the brackets. Two most important formulas in expansion are

[tex](a+b)^2 = a^2+2ab+b^2\\(a-b)^2 = a^2-2ab + b^2[/tex]

Here,

[tex]x^2 - 6x +\\x^2 - 2\times x \times 3+[/tex]

To complete the square, [tex]3^2 = 9[/tex] is needed

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What are the equations for these graphs?

Answers

The absolute value functions graphed are given as follows:

1. y = |x + 1|.

3. y = |x + 1| - 4.

4. y = 0.5(|x - 1| + 1)

How to define an absolute value function?

An absolute value function of vertex (h,k) is defined by the following rule:

y = |x - h| + k.

For item 1, the vertex of the function is at point (-1,0), hence h = -1 and k = 0, and the rule is:

y = |x + 1|.

For item 3, the vertex of the function is at point (-1, -4), hence the coefficients are h = -1 and k = -4, and the rule is:

y = |x + 1| - 4.

For item 4, the vertex of the function is at point (1,1), and the function is also vertically compressed by a factor of 0.5, as when x changes by 2, y changes by 1, hence the rule is:

y = 0.5(|x - 1| + 1)

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use the conversion 8 km/h = 5mph to convert 24m/s into mph

Answers

In the standard conversion unit, 24 m/s equals 54 mph in mph

How to convert the unit?

The conversion equation is given as

8 km/h = 5 mph

Convert 8 km to meters

So, we have the following equation

8 x 1000 m/h = 5 mph

Evaluate the products

So, we have the following equation

8000 m/h = 5 mph

Convert 1 hour to seconds

So, we have the following equation

8000 m/3600 s = 5 mph

Evaluate the quotient

So, we have the following equation

20/9 m/s = 5 mph

Multiply both sides by 9/20

1 m/s = 9/20 * 5 mph

Multiply both sides by 24

24 * 1 m/s = 24 * 9/20 * 5 mph

Evaluate the products

24 m/s = 54 mph

Hence, the equivalent of 24 m/s in mph is 54 mph

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What is the equation of the line that passes through the point (-7,-8) and has a slope of 0

Answers

Answer:  The correct answer is y= -8

Step-by-step explanation:  A line with a slope of zero is a horizontal line. In this case, the horizontal line intersects the y-axis at -8 and includes all values of x.

A herd of buffalo began with a population of 125,000. The average birth rate is 31% per year, but the death rate is 37% per year.
What is the difference between the birth rate and death rate?

Is this population in a state of growth or decay?

Write an exponential equation modeling the population's change over time.

According to your model, what will the population of buffalo in this heard be in 10 years?

Answers

The difference in the birth rate and death rate of the herd of buffalo as indicated in the task content is; 6% net death rate.

The population is in a state of decay.

The exponential equation which models the population is; P = 125,000 (0.94)^n.

The population of the herd after 10 years would be; P = 67,327.

What state is the population in; Growth or decay?

It follows from the task content that the average birth rate is 31% per year, but the death rate is 37% per year.

Hence, the difference between the birth rate and death rate is; 6% net death rate per year.

It therefore follows from the statement above that the population is in a state of decay as it reduces after each successive year due to.higher death rate than birth rate.

Also, since the difference between death and birth rate is a 6% net death rate.

It follows that the model is such that we have;

P = 125,000 (100% - 6%)^n

P = 125,000 (0.94)^n

where, P = current population and n = number of years after.

Finally, the population of the herd after 10 years would be;

P = 125,000 (0.94)¹⁰

P = 67,327.

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