The diameter of a circle is 8 kilometers. What is the circle's area? Use 3.14 for ​. square kilometers

answer is option D ,The multiplicative inverse of a number is the reciprocal of that number such that when you multiply them together, you get one. The multiplicative inverse of -7 is -1/7.

what is multiplicative inverse ?

The multiplicative inverse of a number is also known as its reciprocal. It is the number that, when multiplied by the original number, results in a product of 1. In other words, if the original number is a, then its multiplicative inverse

In the given question,

The additive inverse of a number is the opposite of that number such that when you add them together, you get zero. The additive inverse of -7 is 7.

The multiplicative inverse of a number is the reciprocal of that number such that when you multiply them together, you get one. The multiplicative inverse of -7 is -1/7.

Therefore, the correct answer is (c) multiplicative inverse -1/7; additive inverse -7.

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The difference between  two vectors [tex](u - v )[/tex] = [tex](7,7)[/tex].

An entity with both magnitude and direction is referred to as a vector. A vector can be visualized geometrically as a directed line piece, with an arrow pointing in the direction and a length equal to the magnitude of the vector. The vector points in a direction from its tail to its head.

Therefore subtracting [tex]u-v[/tex] we get

[tex]u-v = (2,5)-(-5,-2\\ = (2+5,5+2)\\=(7,7)[/tex]

The distinction between u and v can be graphically represented in two ways:

The next step is to create the vector [tex]u-v[/tex], which begins at the same location as [tex]u[/tex] and ends at [tex]v[/tex].

In an algebraic sense, the vectors u and v can be represented as points in a coordinate plane, and the vector u - v as a line connecting these places.

The following figure shows the construction with negative velocities

In this case, the vectors u and v are represented by location A and point B, respectively.

Therefore the difference between  two vectors [tex](u - v )[/tex] = [tex](7,7)[/tex].

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You would need to deposit approximately $8,267.40 initially to reach your goal of $7,500 in three years, assuming an annual interest rate of 3%.

What is Algebraic expression ?

Algebraic expression can be defined as combination of variables and constants.

If you have three years to save for a dream vacation and want to save $7,500, there are two main approaches you can take: making regular monthly payments or depositing one single lump sum into a savings account.

Option 1: Regular Monthly Payments

If you decide to make regular monthly payments towards your vacation savings, you will need to calculate how much you need to save each month to reach your $7,500 goal. To do this, you need to divide the total amount you want to save by the number of months you have to save.

In this case, you have 36 months (3 years x 12 months/year) to save $7,500, so:

$7,500 ÷ 36 = $208.33 per month

So, you would need to save approximately $208.33 per month for 36 months to reach your goal of $7,500.

Option 2: Single Lump Sum Deposit

If you decide to deposit one single lump sum into a savings account, you will need to calculate how much you need to deposit initially to reach your $7,500 goal in three years, assuming a certain rate of interest.

The amount you need to deposit will depend on the interest rate you can earn on your savings. For example, if you can earn an annual interest rate of 3%, the calculation would be:

Initial deposit = Future value of $7,500 at 3% interest over 3 years

Using a financial calculator or spreadsheet, you can determine that the future value of $7,500 at 3% interest over 3 years is approximately $8,267.40.

Therefore, You would need to deposit approximately $8,267.40 initially to reach your goal of $7,500 in three years, assuming an annual interest rate of 3%.

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P(X ≤ 2.39)= 0.9967, P(X ≥ -2.39) = 0.3808, P(|X| ≥ 2.39)  = 0.0388 ,P(|X + 3| ≥ 2.39) can be rewritten as P(X + 3 ≤ -2.39) + P(X + 3 ≥ 2.39)=  0.0388,  P(X < 5) = 1 AND P(|X| < 5) =  0.34 with X is a normal random variable .

To solve the given problems, we need to standardize the normal random variable X using the formula Z = (X - μ)/σ, where μ is the mean and σ is the standard deviation.

a) P(X ≤ 2.39) = P(Z ≤ (2.39 - (-3))/2) = P(Z ≤ 2.695) = 0.9967

b) P(X ≥ -2.39) = P(Z ≥ (-2.39 - (-3))/2) = P(Z ≥ 0.305) = 0.3808

c) P(|X| ≥ 2.39) = P(X ≤ -2.39) + P(X ≥ 2.39) = P(Z ≤ (-2.39 - (-3))/2) + P(Z ≥ (2.39 - (-3))/2) = P(Z ≤ -1.805) + P(Z ≥ 2.695) = 0.0354 + 0.0034 = 0.0388

d) P(|X + 3| ≥ 2.39) can be rewritten as P(X + 3 ≤ -2.39) + P(X + 3 ≥ 2.39)

= P(Z ≤ (-2.39 - (-3))/2) + P(Z ≥ (2.39 - (-3))/2) = P(Z ≤ -1.805) + P(Z ≥ 2.695) = 0.0354 + 0.0034 = 0.0388

e) P(X < 5) = P(Z < (5 - (-3))/2) = P(Z < 4) = 1

f) P(|X| < 5) = P(-5 < X < 5) = P((-5 - (-3))/2 < Z < (5 - (-3))/2) = P(-4 < Z < 4) = 0.9987

g) Let the value that X exceeds with a probability of 0.33 be x. Then, we need to find the value of x such that P(X > x) = 0.33. Using the standard normal distribution table, we can find that the z-score for the 0.33 probability is 0.44. So, we can solve for x as follows:

0.33 = P(X > x) = P(Z > (x - (-3))/2) = P(Z > (x + 3)/2)

0.44 = 1 - P(Z ≤ (x + 3)/2)

P(Z ≤ (x + 3)/2) = 1 - 0.44 = 0.56

Using the standard normal distribution table, we can find that the z-score for the 0.56 probability is 0.17. So, we can solve for x as follows:

0.56 = P(Z ≤ (x + 3)/2) = P(Z ≤ (x + 3)/2)

0.17 = (x + 3)/2

x = 0.34

Therefore, with a probability of 0.33, variable X exceeds the value of 0.34.

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It's important to note that the effective interest rate takes into account the Compounding effect, which means that Antonio's savings will grow faster than if the interest was only applied annually.

Antonio has saved 10,000 soles in the bank, and the bank is offering him an annual interest rate of 16% which is compounded monthly. To find out the effective interest rate that Antonio will receive, we need to calculate the annual percentage yield (APY).

The formula for APY is (1 + (interest rate/number of compounding periods))^number of compounding periods - 1.

In this case, the interest rate is 16% and the number of compounding periods is 12 (since the interest is compounded monthly). Plugging these values into the formula, we get:

APY = (1 + (0.16/12))^12 - 1
APY = 0.1728 or 17.28%

So, the effective interest rate that Antonio will receive is 17.28%. This means that at the end of the year, he will have earned 1,728 soles in interest (assuming he doesn't withdraw any money from the account). It's important to note that the effective interest rate takes into account the compounding effect, which means that Antonio's savings will grow faster than if the interest was only applied annually.

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Answer:

13

Step-by-step explanation:

Student: 80 * 55% = 44

Adult: 50 * 98% = 49

49-44=5

if triangle ABC is translated 5 units down, the image's coordinates are A′(1, 7), B′(9, 7), and C′(5, 3).

The x and y coordinates of each of a triangle's vertices must be added to or subtracted from to translate the triangle on a coordinate plane.

Triangle ABC must be translated five units lower in this situation. Thus, we must deduct 5 from the y coordinates of each of its vertices.

A(1, -2) changes to A' (1, -7) B(9, -2) changes to B' (9, -7) C(5, 2) changes to C' (5, -3)

As a result, if triangle ABC is translated 5 units down, the image's coordinates are A′(1, 7), B′(9, 7), and C′(5, 3).

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A) The FPCF for this sample is 0.899. B) The sample size is about 12% of the population size, which is relatively large.

A) The FPCF (Finite Population Correction Factor) is used to adjust for the impact of a finite population on the sampling distribution. The formula for the FPCF is:

FPCF = [tex]\sqrt{((N-n)/(N-1))}[/tex]

where N: size of the population and n: size of the sample.

In this case, the population size is N = 199, and the sample size is n = 24. Therefore, the FPCF can be calculated as follows:

FPCF = [tex]\sqrt{((199-24)/(199-1))}[/tex] = 0.899

So, the FPCF for this sample is 0.899.

B) In general, a population can be considered effectively infinite when the sample size is no more than 5-10% of the population size. In this case, the sample size is n = 24, and the population size is N = 199. Therefore, the sample size is about 12% of the population size, which is relatively large.

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Answer:

The missing values to complete the diagram are:

4 → 6

2 → 5

-1 → -3

To find the missing values, we need to follow the pattern of the given arrows.

Starting with 4 and going to 6, we add 2 to get to the next number. So, starting with 2, we add 3 to get the missing value of 5.

Going from 2 to 5, we add 3 once again. So, to get from 5 to the next number, we add 3 to get 8.

To find the missing value that goes from an unknown number to -3, we need to subtract 3. Since we have already used the numbers 2 and 4, we can try a negative number. Starting with -1 and subtracting 3 gives us the missing value of -3.

Therefore, the completed diagram would look like this:

4 → 6

2 → 5

-1 → -3

Here's the completed diagram with the missing values filled in based on the pattern:

```

4 → 6

2 → 4

-1 → -3

```

The pattern seems to be that for each input value (x), the output value (y) is x + 2.

Answer:

see below

Step-by-step explanation:

The equation y - y₁ = m(x − x₁)

1. y - 7 = -4(x - -3)

y - 7 = -4(x + 3)

y = -4x - 12 + 7

y = -4x - 5

2. y - y₁ = m(x − x₁)

9 - -3 = m(8 - 4)

12 = 4m

m = 12/4 = 3

y = mx + b

-3 = 3(4) + b

b = - 3 - 12

b = -15

y = 3x - 15

The calculated key features of the quadratic functions 1 to 6 are listed below

Function 1: y = 1/2(x + 4)(x - 2)

Expand

y = x^2/2 + x - 4

From the function, we have

a = 1/2 (coefficient of x^2 term)

p = -b/2a (x-coordinate of the vertex)

p = -(1)/2(1/2)

p = -1

q = f(p) (y-coordinate of the vertex)

q = 1/2(1 + 4)(1 - 2)

q = -5/2

From the function, we have

x-intercepts = (-4, 0) and (2, 0)

This also means that the axis of symmetry is

x = -1

The quadratic function opens up because the coefficient of the x^2 term is positive.

Next, we have

Vertex = (-1, -5/2)

For the y-intercept, we have

y-intercept = f(0)

y-intercept = 1/2(0 + 4)(0 - 2)

y-intercept = -4

Slope to a point one unit from the vertex can be found by taking the derivative of the function:

f(x) = x^2/2 + x - 4

f'(x) = x + 1

At x = -2 (one unit to the left of the vertex), the slope is -1

i.e. f'(-2) = -2 + 1 = -1

At x = 0 (one unit to the right of the vertex), the slope is 1.

i.e. f'(0) = 0 + 1 = 1

When the above steps is repeated for the remaining functions, we have the following results:

Function 2: y = 1/2x(x - 8)

The features are:

Function 3: y = (x + 2)(x - 2)

The features are:

Function 4: y = -1/3(x + 1)(x - 5)

The features are:

Function 5: y = 4(x + 2)(x + 1)

The features are:

Function 6: y = -(x - 3)(x - 3)

The features are:

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The equation of the given quadratic equation through which it satisfied the relation are y =

What about quadratic equation?

In mathematics, a quadratic equation is a polynomial equation of the second degree, meaning it has the highest power of the variable x as 2. The standard form of a quadratic equation is:

ax^2 + bx + c = 0

where a, b, and c are constants, and x is the variable. The coefficient a cannot be zero, or else the equation would reduce to a linear equation.

The quadratic equation can be solved using the quadratic formula:

x = [tex]( b + \sqrt{(b^2 - 4ac)) / 2a[/tex]

where the ± sign means that there are two possible solutions for x, one obtained by adding the square root term and the other obtained by subtracting it.

The solutions of a quadratic equation may be real or complex numbers, depending on the discriminant (b^2 - 4ac) of the equation. If the discriminant is positive, the equation has two real solutions. If the discriminant is zero, the equation has one real solution (which is a double root). And if the discriminant is negative, the equation has two complex solutions (which are conjugates of each other).

Quadratic equations are used in various branches of mathematics and physics to model a wide range of phenomena, such as motion, acceleration, gravity, and electromagnetic fields.

According to the given information:

The normal form of the equation are y = [tex]a(x-h)^{2} + k[/tex]

(h,k) = ( -1,2)

When we put the value in the equation we have that,

y = [tex]a(x+1)^{2} + 2[/tex]

As, we see it intercept at (-2,0)

y = 0 and x = -2

0 = [tex]a(-2+1)^{2} + 2[/tex]

a = -2

So y  = [tex]-2(x+1)^{2} + 2[/tex]

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The option that Describe the transformation of LM to L'M'. is: LM is translated 5 units left and 2 units down to L'M'. Answer: option A.

To determine the transformation from LM to L'M', we need to identify how much LM has been translated horizontally and vertically. From the graph, we can see that L has been moved 5 units to the left to reach L', and M has been moved 2 units down to reach M'.

Looking at the graph, we can see that L is moving leftward and downward, while M is moving leftward. This indicates a translation.

Furthermore, the distance that L and M move is 5 units horizontally and 2 units vertically. This means that LM is translated 5 units left and 2 units down to L'M'.

Therefore, the correct answer is OA. LM is translated 5 units left and 2 units down to L'M'.

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Step-by-step explanation:

[tex]\triangle ADB[/tex] is equilateral, so [tex]m\angle DBA=60^{\circ}[/tex].

Using linear pairs, [tex]m\angle DBC=120^{\circ}[/tex].

Answer: J (120)

Step-by-step explanation: Since triangle ABD is given to be an equalatiral triangle, we know that every interior angle is 60 degrees. Since line ABC is a straight line we know that if we subtract the lines angle (180) by the interior angle it goes through (60) we get the measure of angle DBC: 120 degrees

Rachel cycled each lap around the lake that was 2.8 miles long.

What is unit rate?

A unit rate is a ratio in which the denominator is 1. It is a rate that compares a quantity to one unit of another quantity.

First, we need to convert the total distance cycled from feet to miles since the length of each lap is likely to be expressed in miles.

1 mile = 5280 feet

Therefore,

59,136 ft ÷ 5280 ft/mile = 11.2 miles

So, Rachel cycled a total of 11.2 miles around the lake.

Since she cycled 4 laps of the same distance, we can divide the total distance by 4 to get the length of each lap:

11.2 miles ÷ 4 = 2.8 miles per lap

Therefore, Rachel cycled each lap around the lake that was 2.8 miles long.

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Answer:

The answer is 6x + 2

Step-by-step explanation

I did all the work and I passed on this test so i know this is the answer.

Answer:

∀x(D(x)→P(x))→(∃y∃z(St(y) ∧ St(z) ∧ R(y) ∧ R(z) ∧ y≠z))

The statement that is true about the ranges of the data sets is "The range of ages at Table 2 is 1 year greater than the range of ages at Table 1."

In statistics, a data set is a collection of observations or measurements that are typically organized into rows and columns. Each row in a data set represents a single observation or individual, while each column represents a variable or characteristic that has been measured.

The range of a data set is the difference between the maximum and minimum values in the set.

For table 1, the minimum age is 31 and the maximum age is 43, so the range is 43 - 31 = 12.

For table 2, the minimum age is 29 and the maximum age is 42, so the range is 42 - 29 = 13.

Therefore, the statement that is true about the ranges of the data sets is:

"The range of ages at Table 2 is 1 year greater than the range of ages at Table 1."

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Complete question:

The ages of the people at two tables in a restaurant are shown in the chart.

Which statement about the range of the data sets is true?

The value of the expression 12 ÷ {[(6 × 5) ÷ (4 + 1) ÷ 2] + 1} is 3.

We can simplify the expression using the order of operations (also known as PEMDAS)

Which dictates that we perform the operations inside the parentheses first, then any exponents or roots,

Then multiplication and division from left to right, and finally addition and subtraction from left to right.

Applying this rule, we get:

12 ÷ {[(6 × 5) ÷ (4 + 1) ÷ 2] + 1}

= 12 ÷ {[(30) ÷ (5) ÷ 2] + 1}

= 12 ÷ {[6 ÷ 2] + 1}

= 12 ÷ {3 + 1}

= 12 ÷ 4

= 3

Therefore, the value of the expression is 3.

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Answer:

C

Step-by-step explanation:

We Can see from the < pointing to the higher side.

Answer:

Let's call the number of packs of red flyers Taylor gave out "r" and the number of packs of blue flyers she gave out "b". We know that each pack contains 13 red flyers and 20 blue flyers. So the total number of red flyers is 13r and the total number of blue flyers is 20b.

We also know that Taylor gave out the same number of red and blue flyers. In other words:

13r = 20b

To find the minimum number of flyers of each color, we want to find the smallest integer values of r and b that satisfy this equation. One way to do this is to find the least common multiple (LCM) of 13 and 20, and then divide by 13 and 20 to get r and b, respectively.

The prime factorization of 13 is 13, and the prime factorization of 20 is 2 x 2 x 5. The LCM of 13 and 20 is 2 x 2 x 5 x 13 = 520.

So:

13r = 20b

13r = (13/4) x (80b)

r = (13/4) x (80b) / 13

r = 20b

We can see that r = 20b is the smallest integer value that satisfies the equation. Therefore, Taylor distributed a minimum of:

13r = 13 x 20b = 260 red flyers

20b = 20 x 20b = 400 blue flyers

So Taylor distributed a minimum of 260 red flyers and 400 blue flyers.

Answer:

Answer:

Let's call the number of packs of red flyers Taylor gave out "r" and the number of packs of blue flyers she gave out "b". We know that each pack contains 13 red flyers and 20 blue flyers. So the total number of red flyers is 13r and the total number of blue flyers is 20b.

We also know that Taylor gave out the same number of red and blue flyers. In other words:

13r = 20b

To find the minimum number of flyers of each color, we want to find the smallest integer values of r and b that satisfy this equation. One way to do this is to find the least common multiple (LCM) of 13 and 20, and then divide by 13 and 20 to get r and b, respectively.

The prime factorization of 13 is 13, and the prime factorization of 20 is 2 x 2 x 5. The LCM of 13 and 20 is 2 x 2 x 5 x 13 = 520.

So:

13r = 20b

13r = (13/4) x (80b)

r = (13/4) x (80b) / 13

r = 20b

We can see that r = 20b is the smallest integer value that satisfies the equation. Therefore, Taylor distributed a minimum of:

13r = 13 x 20b = 260 red flyers

20b = 20 x 20b = 400 blue flyers

So Taylor distributed a minimum of 260 red flyers and 400 blue flyers.

Step-by-step explanation:

According to the information, he quadratic function's equation is f(x) = (47/13)x^2 + (89/13)x + 198/13 in standard form.

To find the quadratic function's equation, we need to use the given points from the table and solve for the coefficients a, b, and c in the standard form of a quadratic function, f(x) = ax^2 + bx + c.

Using the point (-7, 209):

209 = a(-7)^2 + b(-7) + c

Using the point (-5, 113):

113 = a(-5)^2 + b(-5) + c

Using the point (-2, 29):

29 = a(-2)^2 + b(-2) + c

Now we have three equations with three variables. We can solve for a, b, and c using a system of linear equations. First, simplify each equation:

49a - 7b + c = 209

25a - 5b + c = 113

4a - 2b + c = 29

Then, we can solve for b in terms of a and substitute in the other equations to eliminate b:

b = 7a + c/7 - 29/7

Substituting into the second equation:

25a - 5(7a + c/7 - 29/7) + c = 113

Simplifying:

10a + c = 80

Substituting into the third equation:

4a - 2(7a + c/7 - 29/7) + c = 29

Simplifying:

-3a + c = 33

Now we have two equations with two variables. We can solve for c in terms of a and substitute back into one of the previous equations to solve for a:

c = 3a + 33

Substituting into the second equation:

10a + (3a + 33) = 80

Simplifying:

13a = 47

a = 47/13

Now we can substitute a back into one of the previous equations to solve for c:

c = 3(47/13) + 33 = 198/13

Finally, we can substitute a and c into the standard form of a quadratic function:

f(x) = (47/13)x^2 + (7(47/13) - 198/13)x + 198/13

Simplifying:

f(x) = (47/13)x^2 + (89/13)x + 198/13

Therefore, the quadratic function's equation is f(x) = (47/13)x^2 + (89/13)x + 198/13 in standard form.

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The equations that can be used to solve for y in the given situation are:
(A) y(y + 5) = 750

(B) y² – 5y = 750

(D) y(y – 5) + 750 = 0

An enclosed 2-D shape called a rectangle has four sides, four corners, and four right angles (90°).

A rectangle has equal and parallel opposite sides.

A rectangle has two dimensions—length and width—because it is a two-dimensional form.

The rectangle's longer side is its length, while its shorter side is its breadth.

So, the area formula of the rectangle:

750 = l * w

750 = x * (x-5)

750 = x² - 5x

x² - 5x - 750 = 0

Equations in the options that are similar:

(A) y(y + 5) = 750

(B) y² – 5y = 750

(D) y(y – 5) + 750 = 0

Therefore, the equations that can be used to solve for y in the given situation are:
(A) y(y + 5) = 750

(B) y² – 5y = 750

(D) y(y – 5) + 750 = 0

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Correct question:

The area of a rectangular room is 750 square feet. The width of the room is 5 feet less than the length of the room. Which equations can be used to solve for y, the length of the room? Select three options.

NEED ASAP

Answer choices:

a. y(y + 5) = 750

b. y2 – 5y = 750

c. 750 – y(y – 5) = 0

d. y(y – 5) + 750 = 0

e. (y + 25)(y – 30) = 0

Answer:

40 -12-3 15 multiply all of them and u get your answer

Answer:

Step-by-step explanation:

Just divide the total shape into three shapes one rectangle and two triangles and then calculate the area

Hope this helps: )

Answers:

There are 2 answers:

1. 6,5

2. 5,6

Step-by-step explanation:

The SUM of two numbers IS 11:

x + y = 11

The PRODUCT of two numbers IS 30:

xy = 30

The system we get is

x + y = 11

xy = 30

Now solve the system:

There are 2 possible solutions:

(6,5) and (5,6)

The number of papers that will be graded in 60 minutes is 30 papers.

Proportion refers to the relationship or comparison between two or more quantities or values. It expresses how one quantity relates to another in terms of size, magnitude, or scale. Proportions are often used to describe the relative sizes or ratios of different elements within a whole or between different parts of a whole.

We have that;

2 papers are graded in 4 minutes

1 paper will be graded in 1 * 4/2

= 2 minutes

If 1 paper is graded in 2 minutes

x papers are graded in 60 minutes

x = 30 papers

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Answer:

4)  ∠1 and ∠2,  ∠2 and ∠3

5)  ∠1 and ∠3

6)  x = 10

Step-by-step explanation:

Adjacent angles are two angles that share a common vertex and a common side, but do not overlap.

Therefore, the pairs of adjacent angles in the given diagram are:

Vertical angles are pairs of non-adjacent angles that are formed when two lines intersect.  Vertical angles are congruent,

Therefore, the pair of vertical angles in the given diagram are:

As ∠1 and ∠3 are the same measure:

⇒ m∠1 = m∠3

⇒ (9x)° = 90°

⇒ 9x = 90

⇒ 9x ÷ 9 = 90 ÷ 9

⇒ x = 10

Therefore, the value of x is 10.

Answer:

4)  ∠1 and ∠2,  ∠2 and ∠3.

5)  ∠1 and ∠3.

6)  x = 10.

Step-by-step explanation:

Explanations are given in attachment!

Answer:

in the image

Step-by-step explanation:

using the arithmetic formula

a = ao + d(n-1)

we can find the sum of this formula added up 5 times