Create a matrix for this linear system:

{
x
+
3
⁢
y
+
2
⁢
z
=
26
x
−
3
⁢
y
+
4
⁢
z
=
2
2
⁢
x
+
y
+
z
=
8

What is the solution of the system?

A 10-segment trapezoidal rule is exact to find integrals of polynomials of order 3 or less. Here's a step-by-step explanation:

1. The trapezoidal rule is a numerical integration method used to approximate the integral of a function.
2. It works by dividing the area under the curve of the function into a series of trapezoids and then summing their areas.
3. The number of segments (trapezoids) determines the accuracy of the approximation. In this case, we have 10 segments.
4. The trapezoidal rule is exact for polynomials of order 1 (linear functions) because the area under the curve of a linear function can be exactly represented by trapezoids.
5. However, the trapezoidal rule can also provide exact results for higher-order polynomials in certain cases. For a 10-segment trapezoidal rule, it turns out to be exact for polynomials of order 3 or less.

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The end behavior of f(x)=(2+x2)(x2−36) is determined by the highest degree terms in the numerator and denominator. In this case, the highest degree terms are both x^4.

The numerator (2+x^2) will approach positive infinity as x approaches positive or negative  infinity because the x^2 term dominates.

The denominator (x^2-36) will approach positive infinity as x approaches positive or negative infinity because the x^2 term dominates.

Therefore, as x approaches positive or negative infinity, f(x) will approach positive infinity.

This is because the highest degree term in the function is x^4, which will dominate the function as x approaches infinity or negative infinity. Since the coefficient of x^4 is positive, the function will approach 0 from both sides as x becomes large or very negative.

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Based on the survey conducted by the alumni association, a sample of 100 alumni was taken from the population of all living alumni. Out of this sample, 64 alumni were in favor of firing the coach. To calculate the 95% confidence interval for the proportion of all living alumni who favor firing the coach, we can use the formula: CI = p ± z*(sqrt(p*(1-p)/n))

 To find the 95% confidence interval for the proportion p of all living alumni who favor firing the coach, follow these steps:

1. Identify the sample proportion (p-hat), which is the proportion of alumni in favor of firing the coach in the sample. In this case, p-hat = 64/100 = 0.64.

2. Determine the sample size (n), which is 100 in this case.

3. Find the standard error (SE) of the proportion using the formula SE = sqrt(p-hat * (1 - p-hat) / n). In this case, SE = sqrt(0.64 * (1 - 0.64) / 100) ≈ 0.048.

4. Find the critical value (z) for the 95% confidence interval. For a 95% confidence interval, the z-score is approximately 1.96.

5. Calculate the margin of error (ME) using the formula ME = z * SE. In this case, ME = 1.96 * 0.048 ≈ 0.094.

6. Finally, calculate the 95% confidence interval for p using the formula p-hat ± ME. In this case, the interval is 0.64 ± 0.094, which is approximately (0.546, 0.734).

So, the 95% confidence interval for the proportion of all living alumni who favor firing the coach is approximately (0.546, 0.734).

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For a right angled triangle with side length 57, x and y, the missing sides lenths x and y are equal to the 73.1 and 46.17 respectively.

See the above figure, we have a right angled triangle. Let the be say ABC with measure of angle B be 90°, and the three sides of triangle are defined as length of base of triangle, BC = 57

height of triangle, AB = y

length of hypothonous, AC = x

measure of angle C = 39°

measure of angle B = 90°

So, measure of angle of A = 180° - 90° - 39° = 51°

We have to determine the missing length of sides. Using the trigonometry functions, for determining the value x and y. So, [tex]Cos(39°) = \frac{ 57} {x} [/tex]

=> [tex]x = \frac{ 57} {Cos(39°)} [/tex]

=> x = 57/0.78 = 73.1

Similarly,

[tex]tan(39°) = \frac{y} {57} [/tex]

=> y = 57 × tan(39°)

=> y = 0.81 × 57 = 46.17

Hence, required value is 46.17.

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Complete question:

The above figure complete the question.

The value of area of the star is, A = 1.9 inches

We have to given that;

A ceramic tile has a star-shaped pattern composed of four quarter- circles inside a square with side lengths of 3 inches.

Hence, We get;

Radius of circular cone = 3/2 = 1.5 inches

Now, The value of area of the star is,

A = area of square - area of 4 quarter circle

A = 3 x 3 - 4 (1/4 x 3.14 x 1.5 x 1/5)

A = 9 - 7.065

A = 1.935 inches

A = 1.9 inches

Thus, The value of area of the star is, A = 1.9 inches

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Answer:

7x+7

Step-by-step explanation:

I'm not really sure which answer you need

7(x+1)

x=-1

The area of a rectangle is given by multiplying its length by its width. So, we have: Therefore, the area of the rectangle is 256x²m¹⁰.

When calculating a rectangle's area, we multiply the length by the width of the rectangle. The perimeter of a shape is the space surrounding it. Space inside a form is measured by area.  A closed figure's area is the portion of the plane that it occupys, whereas its perimeter is the space around it. The size of a plane or the area it encloses is expressed in square metres.

An example of a quadrilateral with equal and parallel opposite sides is a rectangle. It is a polygon with four sides and four angles that are each 90 degrees. A rectangle is a form with only two dimensions.

Area = length x width

Area = (8m³)² x (4x²m⁴)

Area = 64m⁶ x 4x²m⁴

Area = 256x²m¹⁰

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The amount quoted by the contractor , given the discount rate and the amounts to be paid, is N 29, 397.19

The amount quoted by the contractor is the total present value of the different future payments by the client.

The present value ( and amount quoted ) is therefore :

= 8, 000 / 1. 10 + 9, 000 / 1. 10 ² + 10, 000 / 1. 10 ³ + 10, 500 / 1. 10 ⁴

= 7, 272.73  + 7, 438.02  + 7, 513.14 + 7, 173.30

= N 29, 397.19

In conclusion, the total quoted was Contractor is $ 29, 397.19 and the amount to be paid every year is N 9, 269.79.

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If Abby deposited $3000 and has $3600 at the end of 8 years, then the interest-rate is 2.5%.

The "Simple-Interest" is the interest which is calculated based only on principle amount of a loan or investment, without taking into account any additional interest earned on previous periods.

We can use the simple interest formula to find the annual interest rate:

⇒ Simple Interest = Principle × Rate × Time,

Where: Principle is = initial deposit of $3000,

Rate = annual interest rate (what we need to find)

Time = number of years the money was invested = 8,

The Simple Interest earned over 8 years : $3600 - $3000 = $600,

Substituting the values,

We get,

⇒ $600 = $3000 × Rate × 8,

⇒ Rate = 600/(3000 × 8),

⇒ Rate = 0.025, or 2.5%.

Therefore, the annual interest rate on the account is 2.5%.

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False. Cross-sectional designs do not show how causal processes occur over time, as they only provide a snapshot of a particular moment in time. Longitudinal designs are better suited for studying causal processes over time

Longitudinal designs are better suited for studying causal processes over time. However, cross-sectional designs can still have a high degree of internal validity, which refers to the extent to which a study accurately measures what it intends to measure.

False. Cross-sectional designs do not show how causal processes occur over time, as they only provide a snapshot of a particular moment in time.

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Answer

R is reflexive

R is not symmetric.

R is transitive

Explanation

(i) R is Reflexive: Yes, R is reflexive because for any (x, y) in RxR, (x, y) R (x, y) is true since x + x ≤ y + y.

(ii) R is Symmetric: No, R is not symmetric. Counterexample: (1, 2) R (0, 1) is true since 1 + 0 ≤ 2 + 1, but (0, 1) R (1, 2) is false since 0 + 1 > 1 + 2.

(iii) R is Transitive: Yes, R is transitive. If (x, y) R (z, t) and (z, t) R (u, v), then x + z ≤ y + t and z + u ≤ t + v. Adding these inequalities, we get x + z + z + u ≤ y + t + t + v. Simplifying, we have x + u ≤ y + v, which means (x, y) R (u, v).

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The graph of the inequality y ≤ (x + 2)² is the graph (a)

From the question, we have the following parameters that can be used in our computation:

(y\le(x+2)^2\)

Express properly

So, we have

y ≤ (x + 2)²

The above expression is a quadratic inequality with a less or equal to sign

This means that

The graph opens upward and the bottom part is shaded

Using the above as a guide, we have the following:

The graph of the inequality is the first graph

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Answer:

[tex]\frac{1}{20}[/tex]

Step-By-Step Explanation:

Min divides one piece of paper into 2 equal parts. This shows the dividend of the equation, or [tex]\frac{1}{2}[/tex]. If she cuts one of those 2 equal parts into 10 pieces, then she is dividing half of the paper by 10. If we set the equation up...

[tex]\frac{1}{2}\div 10[/tex]

And we flip the divisor...

[tex]\frac{1}{2}\cdot \frac{1}{10}[/tex]

We get [tex]\frac{1}{20}[/tex] of the paper as our final answer. Try this solution for a similar problem!

Here are some examples of formulas that contain a rational number that is not an integer is A = (1/2)bh and m = [tex](y_2 - y_1)/(x_2 - x_1)[/tex].

The formula for the circumference of a circle: C = 2πr, where π is a rational number approximately equal to 3.14159.

The formula for the area of a triangle: A = (1/2)bh, where b and h are the base and height of the triangle, respectively.

The formula for the Pythagorean theorem: [tex]a^2 + b^2 = c^2,[/tex] where a, b, and c are the sides of a right triangle and c is the length of the hypotenuse. The square root of a rational number may not be an integer.

The formula for the slope of a line: m = [tex](y_2 - y_1)/(x_2 - x_1)[/tex], where m is the slope and (x1, y1) and (x2, y2) are two points on the line.

The formula for compound interest: A = [tex]P(1 + r/n)^{nt[/tex], where A is the final amount, P is the principal amount, r is the annual interest rate (as a decimal), n is the number of times interest is compounded per year, and t is the number of years.

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Correct Question:

Mention all the formulas contain a rational number that is not an integer.

The statements and reasons for the proof of the triangle angle bisector theorem is shown below.

Since Lines EA and BD are parallel,

<1 = <4 (Corresponding angles)

<2 = <3 (Alternate angles)

<1 = <3 ( BD bisects ∠ABC )

So, by the above three equations, we get

<2 = <4

Then, BE=AB (Opposite sides equal to opposite angles are equal)

Now, In triangle ACE as AE is parallel to BD.

By Basic Proportionality theorem, which states

AD/ DC = BE/ CB

AD  DC = AS/ CB

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It appears that the quality control of the repair process has worked, but we cannot say this with complete certainty.

To determine if the quality control of the repair process has worked, we need to check if the machine has gone longer than expected without repairs.

The expected time between two repairs is given by the formula:

Expected time = α x β

So, in this case, the expected time between two repairs is:

Expected time = 3 x 4 = 12 days

Since it has been 30 days since the last repair, it appears that the quality control has worked and the machine has gone longer than expected without repairs. However, we cannot say this with certainty as there is still a probability of such a long time gap occurring even without any improvement in the repair process.

To make a more precise statement, we can calculate the probability of the machine going 30 days or longer without repairs, assuming the repair process has not improved.

Using the gamma distribution with α= 3 and β= 4, we can calculate this probability as:

P(X > 30) = 1 - P(X ≤ 30)

where X is the time between two repairs.

Using a gamma distribution calculator or software, we can find that:

P(X > 30) ≈ 0.028

This means that there is only a 2.8% chance of the machine going 30 days or longer without repairs if the repair process has not improved.

Therefore, based on this probability, it appears that the quality control of the repair process has worked, but we cannot say this with complete certainty.

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Answer:

D.) 42

Step-by-step explanation:

7 multiplied by 6 is 42, and since the function rule is to multiply by 6, we multiply the input, 7, by 6, to get the output, 42.

Answer:

the answer is D.42

Step-by-step explanation:

have a nice day.

Therefore, the slope of the line passing through the points (2,7) and (-1,6) is 1/3.

We must first subtract the y-coordinates from the x-coordinates in order to get the gradient or slope of a line, and then divide our two results. The ordered pairings two, negative two and four, eight serve as our x- and y-values in the calculation y two minus y one divided by x two minus x one.

The slope of a line passing through two points (x1, y1) and (x2, y2) can be found using the formula:

slope = [tex](y_2 - y_1) / (x_2 - x_1)[/tex]

Substituting the given points:

slope = (6 - 7) / (-1 - 2) = -1 / (-3) = 1/3

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The optimal solution to this linear programming problem will give us the ideal weight for each compound that satisfies all the constraints and minimizes the total cost of the compounds used.

What is linear equation?

A linear equation is a mathematical equation that describes a straight line in a two-dimensional plane.

To build a linear programming model for this problem, we need to define decision variables, objective function, and constraints.

Let:

x1 be the weight of the first compound in grams

x2 be the weight of the second compound in grams

Objective function:

The objective is to minimize the total cost of the compounds used, which can be expressed as:

minimize 3x1 + 8x2

Constraints:

The total weight of the product should be 200 grams. This can be expressed as:

x1 + x2 = 200

The first compound should not exceed 80 grams. This can be expressed as:

x1 ≤ 80

The second compound should not be less than 60 grams. This can be expressed as:

x2 ≥ 60

The weights of both compounds should be non-negative. This can be expressed as:

x1 ≥ 0, x2 ≥ 0

Therefore, the complete linear programming model can be formulated as follows:

minimize 3x1 + 8x2

subject to:

x1 + x2 = 200

x1 ≤ 80

x2 ≥ 60

x1 ≥ 0

x2 ≥ 0

The optimal solution to this linear programming problem will give us the ideal weight for each compound that satisfies all the constraints and minimizes the total cost of the compounds used.

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The probability that a randomly selected bolt will have a diameter greater than 0.60 cm is approximately 0.6915.

We know that the diameters of bolts produced on a certain machine are normally distributed with a mean (μ) of 0.62 cm and a standard deviation (σ) of 0.04 cm.

Let X be the diameter of a bolt. Then, X ~ N(μ, σ) = N(0.62, 0.04).

We need to find the probability that a randomly selected bolt will have a diameter greater than 0.60 cm.

P(X > 0.60) = P((X - μ)/σ > (0.60 - 0.62)/0.04) (standardizing X)

= P(Z > -0.5) (where Z ~ N(0,1) is the standard normal distribution)

Using the standard normal distribution table or calculator, we can find that P(Z > -0.5) is approximately 0.6915.

Therefore, the probability that a randomly selected bolt will have a diameter greater than 0.60 cm is approximately 0.6915.

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The width of the concrete path is 0.65 m.

The width of the concrete path is calculated as follows;

let the width of the concrete path = x

The dimensions of the shed with the path around it is determined as;

2x + 4  by 2x + 2

The equation for the area of this path becomes;

(2x + 4)(2x + 2)  - (4 x 2) = 9.5

4x² + 4x + 8x + 8 - 8 = 9.5

4x² + 12x = 9.5

4x² + 12x - 9.5 = 0

solve the quadratic equation using formula method;

a = 4, b = 12, and c = -9.5.

The solution becomes, x = 0.65 m or - 3.65

We will take the positive dimension, x = 0.65 m

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The value of the book after three years is  $18661.

Given that the depreciation can be obtained from the use of;

An = P(1 - r)^t

An = value at the given time

P = initial value

r = rate of depreciation

t = time

Thus;

19200 = 24200 (1 - r)^6

19200/24200 =  (1 - r)^6

0.79 =  (1 - r)^6

ln 0.79 = 6ln(1 - r)

-0.23 = 6ln(1 - r)

ln(1 - r) = -0.23/6

ln(1 - r) = -0.038

1 - r = e^-0.038

r = 0.083

r = 8.3%

After three years;

An = 24200(1 - 0.083)^3

An = $18661

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a. John Underpar's possible monetary outcomes are either winning, which is worth -$5 (the cost of the ticket).

b. the driver (worth $300) or having a worthless ticket (worth $0).

c) Probability of getting nothing = 79/80 = 0.9875
Probability of winning the driver = 1/80 = 0.0125
d. the expected value of buying a ticket is -$1.19, which means on average, a person can expect to lose $1.19 by buying a ticket.
e.the expected return to the club is $100 if all 80 tickets are sold.

a. John Underpar's possible monetary outcomes are either winning the Taylormade R9 10.5 regular flex driver, which is worth $300, or having a worthless ticket, which is worth -$5 (the cost of the ticket).

b. Actually, winning the driver is worth $300, not $295. So, Mr. Underpar's possible monetary outcomes are either winning the driver (worth $300) or having a worthless ticket (worth $0).

c. Mr. Underpar's "experiment" can be summarized as a probability distribution with the following probabilities:

Probability of getting nothing = 79/80 = 0.9875
Probability of winning the driver = 1/80 = 0.0125

d. The mean or expected value of the probability distribution can be calculated as:

Expected value = (Probability of winning the driver x Value of winning) + (Probability of getting nothing x Value of nothing)
Expected value = (0.0125 x $300) + (0.9875 x -$5)
Expected value = $3.75 - $4.94
Expected value = -$1.19

Therefore, the expected value of buying a ticket is -$1.19, which means on average, a person can expect to lose $1.19 by buying a ticket.

e. If all 80 tickets are sold, the expected return to the club can be calculated as:

Expected return = (Number of tickets sold x Price of a ticket) - Value of the prize
Expected return = (80 x $5) - $300
Expected return = $400 - $300
Expected return = $100

Therefore, the expected return to the club is $100 if all 80 tickets are sold.

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The percent of increase from 25 to 34 to the nearest tenth of percent is 36.

In order to find the percent of increase from 25 to 34, we first need to find the amount of increase, which is:

34 - 25 = 9

Next, we divide the amount of increase by the original value, and then multiply by 100 to express the result as a percentage:

(9 / 25) x 100 ≈ 36

Therefore, the percent of increase from 25 to 34 is approximately 36%.

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a) The quadratic equation x² + 7x + 10 = 0 has two distinct real roots
b) The quadratic equation 4x² - 3x + 4 = 0 has two complex (non-real) roots.

The discriminant of a quadratic equation of the form ax² + bx + c = 0 is given by the expression b² - 4ac. The value of the discriminant can help us determine the nature of the roots of the quadratic equation.

Specifically:

If the discriminant is positive, then the quadratic equation has two distinct real roots.

If the discriminant is zero, then the quadratic equation has one real root (also known as a double root or a repeated root).

If the discriminant is negative, then the quadratic equation has two complex (non-real) roots.

Using this information, we can determine the number of real solutions for each of the given quadratic equations without actually solving them:\

a) x² + 7x + 10 = 0

Here, a = 1, b = 7, and c = 10.

Therefore, the discriminant is:

b² - 4ac = 7² - 4(1)(10) = 49 - 40 = 9

Since the discriminant is positive, this quadratic equation has two distinct real roots.

b) 4x² - 3x + 4 = 0

Here, a = 4, b = -3, and c = 4.

Therefore, the discriminant is:

b² - 4ac = (-3)² - 4(4)(4) = 9 - 64 = -55

Since the discriminant is negative, this quadratic equation has two complex (non-real) roots.

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Let’s look at the function f: ZZ. f(z) = 22-32+2.

a) The domain of function f is ZZ (all integers). The codomain of function f is also ZZ. The image (range) of the function f is { -8, -6, 6, 8 }.

b) f(Z+) = { 6, 8 }, f(Z-) = { -8, -6 }.

c) f({2,6}) = { 6 }, f-1({-4}) = {}, f-1({0,-1,-2}) = { 2 } and f¹({2,3,4}) = {}.

Let f(x)=√r+4 and g(x) = 2x − 1.

a) The maximal range for function f such that it is a subset of R is [4, ∞). The maximal range for function g such that it is a subset of R is (-∞, ∞).

b) (fog)(x) = f(g(x)) = √(2x-1+4) = √(2x+3). The maximal range for (fog)(x) such that it is a subset of R is [√3, ∞).

c) (go f)(x) = g(f(x)) = 2√(r+4)-1. The maximal range for (go f)(x) such that it is a subset of R is [1, ∞).

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The leading term of the equation can be used to predict how many roots a polynomial will have.

To find the number of roots in a polynomial, look at the equation's leading phrase. A word with the most power is said to be leading.

Think about the linear formula x – 4 = 0.

The equation's highest power, 1, will only have one root.

We can check it by simplification

x = 4

The equation has only one root x = 4.

Consider the quadratic equation

10t² - t - 3 = 0

The equation's highest power, 2, will have two roots.

By simplifying and applying the middle term splitting approach, we can verify it.

10t² + 5t - 6t - 3 = 0

Taking out the common terms

5t (2t + 1) - 3 (2t + 1) = 0

(2t + 1) (5t - 3) = 0

t = -1/2 and t = 3/5

So the equation has two roots.

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Perimeter of the polygon ABCDEF is 24 units .

Given, vertices of polygons: A(1, –3), B(–1, –3), C(–1, –1), D(–4, –1), E(–4, 5) and F(1, 5).

Perimeter of the polygon is calculated by adding all the side lengths of the polygon .

According to distance formula,

[tex]d = \sqrt{ (x_2 - x_1)^2 + (y_2 - y_1)^2}[/tex]

Side AB :

[tex]d = \sqrt{ (-1 - 1)^2 + (-3 - (-3))^2}\\d = \sqrt{4 + 0}\\d = 2 units[/tex]

Side BC :

[tex]d = \sqrt{ (-1 - (-1))^2 + (-1 - (-3))^2}\\d = \sqrt{0 + 4}\\d = 2 units[/tex]

Side CD :

[tex]d = \sqrt{ (-4 - (-1))^2 + (-1 - (-1))^2}\\d = \sqrt{9 + 0}\\d = 3 units[/tex]

Side DE :

[tex]d = \sqrt{ (-4 - (-4))^2 + (5 - (1))^2}\\d = \sqrt{0 + 16}\\d = 4 units[/tex]

Side EF :

[tex]d = \sqrt{ (1 - (-4))^2 + (5 - (5))^2}\\d = \sqrt{25 + 0}\\d = 5 units[/tex]

Side FA:

[tex]d = \sqrt{ (1 - (1))^2 + (5 - (-3))^2}\\d = \sqrt{0 + 64}\\d = 8 units[/tex]

Perimeter of the polygon = AB + BC + CD + DE + EF + FA

Perimeter of the polygon = 2 + 2 + 3 + 4 + 5 + 8

Perimeter of the polygon = 24 units

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The value of x is 48⁰ if EF is tangent to the circle at E.

In geometry, a tangent to a circle is a straight line or line segment that touches the circle at exactly one point. This point of contact is called the point of tangency.

To find the center angle we need to join OD and OC as shown in Figure.

∠ODC = ∠OCD = 90⁰ - 70⁰ = 20⁰

∠DOC = 180⁰ - 20⁰ - 20⁰ = 140⁰

Hence,

(5x-20)⁰ = 360⁰ - 140⁰

5x - 20 = 220⁰

5x = 240⁰

x = 48⁰

Hence, the value of x is 48⁰

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"The given question is incomplete, the complete question figure is attached below as Question Figure"

"EF is tangent to the circle at E. Find the value of x"