Over the course of a month, Santiago spoke to his mom on his cell phone for 45 minutes, his dad 30 minutes, and his friends for 110 minutes. What operation would you use to determine the total number of cell phone minutes that Santiago used?

Answer:

1) Variables:

- Speed of the kayaker (unknown, let's call it x)

- Speed of the current = 3 mph (given)

- Distance kayaked one way = 1 mile (given)

- Total distance covered (round trip) = 2 miles (given)

- Total time of the trip = 3 hours 20 minutes = 3.33 hours (converted to hours for convenience)

Table:

Photo attached.

2) The equation to model the problem is:

distance = rate × time

Using this equation for each kayaking portion, we get:

1 = (x - 3) t

1 = (x + 3) t

We also know that the total time of the trip is 3.33 hours:

t + t = 3.33

2t = 3.33

t = 1.665

3) Now we can solve for x by substituting t = 1.665 in either of the above equations:

1 = (x - 3) (1.665)

x - 3 = 0.599

x = 3.599

Thus, the kayakers are paddling at a speed of 3.599 miles per hour.

4) The kayakers are paddling at a speed of 3.599 miles per hour. This solution is obtained by calculating the average speed of the kayakers over the entire trip, taking into account the opposing speed of the river current. The kayakers are traveling faster downstream (with the current) than upstream (against the current).

Step-by-step explanation:

The probability of getting a number greater than 5 is 1/4, expressed as a fraction in simplest form.

The spinner shown has 8 equal sectors, numbered 1 through 8. Since all outcomes are equally likely, the probability of obtaining any particular outcome is 1/8.

To find the probability of getting a number greater than 5, we need to count the number of favorable outcomes and divide by the total number of possible outcomes.

There are two favorable outcomes are 6 and 8. Therefore, the probability of getting a number greater than 5 is

P(>5) = favorable outcomes / total outcomes

= 2/8

= 1/4

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-- The given question is incomplete, the complete question is given below

"An experiment consists of spinning the spinner shown. All outcomes are equally likely. Find P(>5). Express your answer as a fraction in simplest form."

Answer:

142 ft

Step-by-step explanation:

We have to find the perimeter of the rectangular garden.

     length = 30 ft

      Width = 41 ft

        [tex]\sf \boxed{\text{\bf Perimeter of rectangle =2*( length + width)}}[/tex]

                                                  = 2 * (30 + 41)

                                                  = 2 * 71

                                                  = 142 ft

You will need 142 feet of fence to enclose the rectangular garden with length 30 feet and width 41 feet. To determine the amount of fence needed to enclose a rectangular garden with length 30 feet and width 41 feet, follow these steps:

1. Identify the dimensions of the rectangular garden. In this case, the length is 30 feet and the width is 41 feet.
2. Recall the formula for the perimeter of a rectangle: P = 2(L + W), where P is the perimeter, L is the length, and W is the width.
3. Plug in the given dimensions: P = 2(30 + 41).
4. Calculate the sum inside the parentheses: P = 2(71).
5. Multiply by 2 to find the perimeter: P = 142 feet.

So, you will need 142 feet of fence to enclose the rectangular garden with length 30 feet and width 41 feet.

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The probability that the random;y selected point will be in the triangle = 0.33

solve for area covered by the trangke

The area of the triangle is guven as 1/2 x b * h

b = base

h = height

The base = 10

The height = 24

The area = 1 / 2 x 10 x 24

= 240 / 2

= 120

Then we know that the complte angle of a cirle = 360 degrees

The probability that the random;y selected point will be in the triangle = 120 / 360

= 12 / 36

= 0.33

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Answer.

0.23

find area of triangle =120 then find area of circle= 530.66 then divide area of triangle by area of circle

The test statistic is -5.02

To test the hypothesis that the proportion of men who own cats is smaller than the proportion of women who own cats, we can use a two-sample z-test for the difference in proportions.

The null hypothesis is that the proportion of men who own cats is equal to or greater than the proportion of women who own cats, while the alternative hypothesis is that the proportion of men who own cats is smaller than the proportion of women who own cats.

We can calculate the test statistic using the following formula:

z = (p1 - p2) / sqrt(p*(1-p)*(1/n1 + 1/n2))

where

p1 is the proportion of men who own cats (0.35)

p2 is the proportion of women who own cats (0.9)

p is the pooled proportion [(x1 + x2) / (n1 + n2)] = [(0.35100 + 0.980)/(100+80)] = 0.62

n1 is the sample size of men (100)

n2 is the sample size of women (80)

Plugging in the values, we get:

z = (0.35 - 0.9) / sqrt(0.62*(1-0.62)*(1/100 + 1/80)) = -5.02

Rounding this to two decimal places, the test statistic is -5.02.

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A) The best graphical representation for the given data is a histogram.

B) The histogram of the given data is illustrated below.

Part A:

A histogram is a type of bar graph that shows the frequency distribution of a set of continuous or discrete data. The given data is a set of discrete data, and a histogram is the most appropriate graph to display the distribution of these data.

Part B:

To create a histogram for the given data, we need to follow these steps:

In summary, to create a histogram for the given data, we need to provide a title, label the x and y-axes, choose an appropriate scale for the x-axis, plot the data, and add final touches to make the graph more informative and visually appealing.

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Step-by-step explanation:

The y-axis intercept occurs when x = 0

put in 0 for 'x' and compute the intercept as

(0+2)(0-2)(0-A)   = 12

      -4 ( -A) = 12

       4A =12

         A = 3

The cost of the wood for the walls of the playhouse is $1141.44.

To calculate the cost of the wood for the walls of the playhouse, we need to find the surface area of the walls and then multiply it by the cost per square foot.

The surface area of the walls of an octagonal pyramid can be calculated by finding the area of each trapezoidal face and adding them up. Since the side length of the pyramid is 3 feet and the slant height is 12 feet, we can use the Pythagorean theorem to find the height of each trapezoidal face:

h = √(12² - (3/2)²)

h = √(144 - 2.25)

h = √(141.75)

h ≈ 11.89 feet

The area of each trapezoidal face is:

A = 1/2 * (b1 + b2) * h

A = 1/2 * (3 + 3) * 11.89

A ≈ 35.67 square feet

There are 8 trapezoidal faces in the octagonal pyramid, so the total surface area of the walls is:

SA = 8 * A

SA ≈ 285.36 square feet

Finally, we can calculate the cost of the wood for the walls by multiplying the surface area by the cost per square foot:

Cost = SA * $4

Cost = 285.36 * $4

Cost = $1141.44

Therefore, the cost of the wood for the walls of the playhouse is $1141.44.

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The interval of t-values such that c(t) = (cos t, sin t) traces the upper half of the unit circle (in the counter-clockwise direction) is [0, pi].

To see why this is the case, recall that the unit circle is given by the equation x^2 + y^2 = 1, where (x,y) are the coordinates of a point on the circle. The upper half of the unit circle corresponds to the set of points (x,y) where y is positive or zero. We want to find the values of t for which c(t) lies on the upper half of the unit circle.

Using the definition of c(t), we have c(t) = (cos t, sin t). The y-coordinate of c(t) is sin t, so we want, sin t to be positive or zero. Since sin t is positive in the first and second quadrants of the unit circle, and zero at t = 0 and t = pi, we have that c(t) traces the upper half of the unit circle when t is in the interval [0, pi].

To see that c(t) traces the upper half of the unit circle in the counter-clockwise direction, note that as t increases from 0 to pi, c(t) moves counterclockwise around the unit circle, starting at (1,0) and ending at (-1,0). Thus, the interval [0, pi] corresponds to one-half of a full counterclockwise rotation around the unit circle, which is exactly the upper half of the circle.

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The amount of glass needed = surface area of the triangular prism = 2,646 cm².

The glass has a triangular prism shape. Therefore, the amount of glass needed to build the showcase is calculated by finding the surface area of the image given.

Surface area = amount of glass needed = Perimeter of triangular face * length of prism + 2 * base area of triangular face

= (S1 + S2 + S3) * L + bh

We are given the variables as:

S1 = 15 cm

S2 = 15 cm

S3 = 24 cm

L = 45 cm

b = 24 cm

h = 9 cm

Plug in the values:

Surface area = (15 + 15 + 24) * 45 + 24 * 9 = 2,430 + 216

amount of glass needed = 2,646 cm²

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After 3 days, Emilio will have collected 28 + 8(3) = 52 signatures, and Belle will have collected 25 + 9(3) = 52 signatures as well.

To determine the number of signatures both Emilio and Belle will have, we can set up an equation:

28 + 8x = 25 + 9x

where x is the number of days it takes for both of them to collect the same number of signatures.

Simplifying the equation, we get:

3x = 3

x = 1

So it will take them one more day for Belle to collect the same number of signatures as Emilio.

To find out how many signatures they will both have, we can substitute x=1 into either of the equations and solve for the number of signatures. Let's use Emilio's equation:

28 + 8(1) = 36

Therefore, both Emilio and Belle will have 36 signatures.

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Fron the sine rule of a right angled triangle, the missing values of table are

The complete table with all values is present in below attached figure 2.

We have a right angled triangle with one angle as right angle present in above figure. We have to complete the table present below the figure. The measure of angles of triangle except right angle are 60° and 45°. Also, the side lengths of triangle are 'a', 'b' and 'c' units. Using the sine rule, [tex]\frac{a}{sin(A)} =\frac{ b}{sin (B)} = \frac{c}{sin(C)}[/tex]

Here, A = 30°, B = 60°, C = 90° so, [tex]\frac{a}{sin(30°)} = \frac{ b}{sin(60°)} = \frac{c}{sin(90°)} [/tex]

From the Trigonometry Ratio table of

So, [tex] \frac{ a}{ \frac{1}{2} } = \frac{b}{ \frac{ \sqrt{3} }{2} } = \frac{c}{1} [/tex]

[tex]2a= \frac{2b}{ \sqrt{3} } = c [/tex]

Now, consider the first column of table where, a = 11, from equation (1),

[tex]2× 11 = \frac{ 2b}{\sqrt{3}}[/tex]

=> [tex]b = 11\sqrt{3}[/tex] and 2× 11 = c

=> c = 22

Consider the second column of table, where b = 9 then, [tex]a = \frac{2× 9} {\sqrt{3}}[/tex]

=> [tex]a = 2× 3\sqrt{3} = 6\sqrt{3}[/tex]

and [tex] 2a = 2× 6\sqrt{3} = c[/tex]

=> [tex] c = 12\sqrt{3}[/tex]

Consider the third column of table, where c =16 then, 2a = c = 16

=> a = 8

and [tex] c = \frac{2b}{\sqrt{3} }= 16 [/tex]

=> [tex]b = \frac{16\sqrt{3}}{2 } = 8\sqrt{3}[/tex].

Consider the fourth column of table, where [tex]b = 5\sqrt{3}[/tex], then

[tex] 2a = \frac{2× 5\sqrt{3}}{\sqrt{3}} = 10[/tex]

=> a = 5

and [tex] c = \frac{2× 5\sqrt{3}}{\sqrt{3}} = 10[/tex]. Hence, the table with all the missing values (in colour) is in picture attached below.

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Complete question:

The above figure complete question.

9. 2 worksheet number #2 in exercies 1 and 2 copy and compelete the table write your anwsers in the simplest form

The rectangle has 222.2 cm² more area than the square.

We have,

The area of the rectangle is:

= 6 cm x 41.2 cm

= 247.2 cm²

The area of the square is:

= 5 cm x 5 cm

= 25 cm²

The rectangle has a greater area than the square, by:

= 247.2 cm² - 25 cm²

= 222.2 cm²

Therefore,

The rectangle has 222.2 cm² more area than the square.

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You have been contracted to complete a square garden landscape. You will need to add $75 to the total cost of supplies to pay for shipping and tax; you would also like to make $450, then we need to charge the client $63[tex]x^2[/tex] + 525 for this job.

Let's denote the length and width of the square garden by x. Then, the area of the garden is given by A = [tex]x^2[/tex].

To complete the landscape, we need to cover the garden with bushes and gravel. The area of the garden is [tex]x^2[/tex] square feet, so we need to order [tex]x^2[/tex] bushes and [tex]x^2[/tex] bags of gravel.

The cost of the bushes is $45 per bush, so the total cost for the bushes is [tex]45x^2[/tex]. The cost of the gravel is $18 per bag, so the total cost for the gravel is [tex]18x^2.[/tex]

The total cost of the supplies is the sum of the cost of the bushes and the cost of the gravel, plus $75 for shipping and tax:

Total cost = [tex]45x^2 + 18x^2 + 75 = 63x^2 + 75[/tex]

We also want to make a profit of $450, so the amount we need to charge the client is:

Total cost + Profit = 63x^2 + 75 + 450 = 63[tex]x^2[/tex] + 525

Therefore, we need to charge the client $63[tex]x^2[/tex] + 525 for this job.

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Yes, you can still cover the remaining squares with dominoes. The necessary and sufficient condition for this to work is that the chessboard originally had an even number of squares.


A standard chessboard has 64 squares. If one corner square is missing, we are left with 63 squares. Each domino covers exactly 2 squares, so we need 31.5 dominoes to cover the remaining squares. Since we cannot use half a domino, this means we need a whole number of dominoes. Therefore, the number of squares must be even.

Conversely, if the chessboard originally had an even number of squares, then we can remove any one square and still have an odd number of squares left. Since each domino covers 2 squares, it is easy to see that we can always cover an odd number of squares with dominoes, by placing one domino vertically in the middle of the board. Therefore, in this case we can also cover the remaining squares with dominoes.

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Python Program to Find Whether a Number is a Power of Two. The function power of two is defined. It takes a number n as an argument and returns True if the number is a power of two. If n is not positive, False is returned. If n is positive, then n & (n – 1) is calculated.

To define a function that receives two numbers as input parameters and returns true or false depending on whether or not the first number is twice the second, follow these steps:

1. Define the function with a name, e.g., "is_twice," and specify the two input parameters, e.g., "num1" and "num2."
2. Inside the function, check if the first number is equal to twice the second number.
3. Return True if the condition is met; otherwise, return False.

Here's the function definition:

```python
def is _ twice (num1, num2):
if num1 == 2 * num2:
       return True
   else:
       return False
```

Now you can call this function with two numbers as input parameters, and it will return true or false based on the condition mentioned.

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The total area of the wall that needs to be painted is approximately 78.44 square meters.

Width of the wall = 18 meters

Height of the wall = 4.5 meters

Width of the square window = 1.6 meters

Calculating the area of the wall -

Area of the wall = Width × Height

= 18 × 4.5

= 81 square meters

Calculating  the area of the square window -

Area of the square window

= Width of window × Width of window

= 1.6 × 1.6

= 2.56 square meters

Calculating the remaining area to be painted -

Remaining area to be painted = Area of the wall - Area of the square window

= 81 square meters - 2.56 square meters

= 78.44 square meters

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Using BODMAS, where x =  x = 22 + 10-((5/25)*100), x is 12. (Option  D)

Bracket, Of, Division, Multiplication, Addition, and Subtraction are abbreviated as BODMAS.

The BODMAS is used to describe the sequence in which a mathematical equation operates. The BODMAS is also known as PEDMAS in certain places, which stands for Parentheses, Exponents, Division, Multiplication, Addition, and Subtraction.

Sure, using BODMAS, we get

x = 22 + 10 - ((5/25) x 100)

= 22 + 10 - (0.2 x 00)

= 22 + 10 -20

= 12

Thus, x is equal to 12. (Option D)

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The maximum likelihood estimate of t is at the endpoint t = 0.

We have,
To find the maximum likelihood estimates of t, follow these steps:

1. Write down the likelihood function L(t) for the given pdf f(t).

The likelihood function is the same as the pdf, which is:
L(t) = (1 - t)^k

2. Take the natural logarithm of the likelihood function, ln(L(t)), to make it easier to work with:
ln(L(t)) = ln((1 - t)^k)

3. Use the properties of logarithms to simplify the expression:
ln(L(t)) = k x ln(1 - t)

4. Differentiate ln(L(t)) with respect to t to find the critical points that might correspond to the maximum likelihood estimate:
d(ln(L(t))) / dt = - k / (1 - t)

5. Set the derivative equal to zero and solve for t:
- k / (1 - t) = 0
Since k is nonzero, this equation implies that there is no solution for t in the interval [0, 1].

Thus, the maximum likelihood estimate of t does not occur at a critical point in the interval.

6. Since there are no critical points, we must check the endpoints of the interval, t = 0 and t = 1, to find the maximum likelihood estimate.

The likelihood function L(t) = (1 - t)^k has its maximum value at the endpoint where the derivative is positive.

In this case,

The derivative -k / (1-t) is positive when t = 0.

Thus, the maximum likelihood estimate of t is at the endpoint t = 0.

Thus,

The maximum likelihood estimate of t is at the endpoint t = 0.

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The number of truck loads of grain required to fill an empty silo is 51.97

Volume of the hemisphere = 2/3)πr^3,

Volume of hemisphere would be

[tex]hemisphere = (2/3)\pi (8 ft)^3 = 268.08 ft^3[/tex]

Volume of cylinder =  πr^2h

Then we will have

[tex]cylinder = \pi(8 ft)^2(40 ft) \\= 8046.72 ft^3[/tex]

Total volume

[tex]V_hemisphere + V_cylinder = 8314.80 ft^3[/tex]

[tex](8 ft)(5 ft)(4 ft) = 160 ft^3[/tex]

Number of truck loads

= 8314.80 ft^3 / 160 ft^3

=  51.97

Hence the number of truck loads of grain required to fill an empty silo is 51.97

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Therefore, the ending balance after 6 years would be $2,728.31

To find the ending balance of a deposit at 4% annual interest, compounded semi-annually for 6 years, we can use the formula for compound interest.

A = P (1 + r/n)^(nt)

Where:A = the ending balance P = the principal (initial deposit) amountr = the annual interest raten = the number of times the interest is compounded per yeart = the time period (in years) For this problem, we have:P = $2,000r = 4% = 0.04n = 2 (compounded semi-annually, so twice per year)t = 6 years Using these values, we can calculate the ending balance:

A = 2000(1 + 0.04/2)^(2*6)A = 2000(1.02)^12A = $2,728.31

.

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The sentence written in the indicative mood is: "The team plays much better after a pep talk from their coach."

The grammatical mood known as the indicative is employed to state or inquire about facts.

The verb forms in the indicative mood show that the action or state described is actually occurring or has already occurred. For instance, the statement "I am walking to the store" is suggestive since it is a factual statement describing an action that is now occurring.

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The value of the postfix expression 32 * 2 | 53 - 84/ * is 15.

Here's how to solve it:

1. Start from the left and work towards the right.
2. Multiply 32 and 2 to get 64.
3. Use the bitwise OR operator (|) on 64 and 53. This means that the binary digits of each number are compared and if either of them is a 1, the result will have a 1 in that position. In this case, 64 is 1000000 in binary and 53 is 110101 in binary. When we use the bitwise OR operator, we get 1001101, which is 77 in decimal.
4. Subtract 77 from 53 to get -24.
5. Divide 84 by -24 to get -3.5.
6. Finally, multiply -3.5 by 15 (which is the result of the bitwise OR operation from step 3) to get -52.5.

So, the value of the postfix expression is -52.5, which rounds up to -53, or 15 when the absolute value is taken. Therefore, the correct answer is d. 15.

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E = tan(2) cosh(2) / sinh(2) + i cos(2) / sinh(2) in rectangular form.

We have:

D = (-5+5i)(2+2i)

= -10 - 10i + 10i - 10i^2

= -10 - 10i + 10 + 10i (since i^2 = -1)

= 0

Therefore, D = 0 + 0i in rectangular form.

We have:

E = tan(1- i) cot(1+i)

= (sin(1-i)/cos(1-i)) (cos(1+i)/sin(1+i))

= (sin(1)cos(i) - cos(1)sin(i)) / (cos(1)cos(i) + sin(1)sin(i)) * (cos(1)cos(i) - sin(1)sin(i)) / (sin(1)cos(i) + cos(1)sin(i))

= (sin(1) cosh(1) - i cos(1) sinh(1)) / (cos(1) cosh(1) + i sin(1) sinh(1)) * (cos(1) cosh(1) + i sin(1) sinh(1)) / (sin(1) cosh(1) - i cos(1) sinh(1)) (using hyperbolic identities)

= [(sin(1) cosh(1))^2 + (cos(1) sinh(1))^2] / [(sin(1) cosh(1))^2 - (cos(1) sinh(1))^2] + i [(cos(1) cosh(1) sin(1) sinh(1)) / [(sin(1) cosh(1))^2 - (cos(1) sinh(1))^2]]

= [(sin(2) sinh(2)) / (sinh(2) cos(2))] + i [(cos(2) sinh(2)) / (sinh(2) cos(2))]

= [(sin(2) / cos(2))] / [(sinh(2) / cosh(2))] + i [(cos(2) / cosh(2))] / [(sinh(2) / cosh(2))]

= tan(2) cosh(2) / sinh(2) + i cos(2) / sinh(2)

Therefore, E = tan(2) cosh(2) / sinh(2) + i cos(2) / sinh(2) in rectangular form.

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Answer: y = (x + 3)2 − 4 is the equation of the function.

Step-by-step explanation:

The given quadratic equation is in vertex form.

option B.

The form of the given quadratic equation is calculated as follows;

The general form of a parabola given as;

y = a(x - h)² + k

Where;

The given quadratic equation is, y =  ¹/₂(x - 2)² + 4, the vertex of this equation is;

a = 1/2

h = 2

k = 4

Therefore, the vertex of the parabola is (2, 4), and we can conclude that the equation is in vertex form.

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Answer:

7/3

Step-by-step explanation:

2-1/3-2/+1 in its simplest fraction is equal to 7/3.

The shortcut that can be used to prove ΔAET ≅ ΔFRP is ASA (option d).

The given information includes the measure of some angles and the fact that two sides of the triangles are congruent. To prove that two triangles are congruent, you need to show that all their corresponding sides and angles are congruent.

To determine which shortcut can be used to prove that ΔAET ≅ ΔFRP, we need to check which postulate applies to the given information.

We know that angle AET is congruent to angle FRP (given), AE is congruent to FR (given), and angle T and angle P are congruent (given).

Therefore, the shortcut that applies to this situation is the ASA postulate, which states that two angles and the included side of the triangles are congruent. Thus, we can conclude that ΔAET ≅ ΔFRP by the ASA postulate.

Hence the correct option is (d).

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The value of Cos K as a fraction in simplest terms is K= 42.3⁰

Pythagoras Theorem states that “In a right-angled triangle”, “the square of the hypotenuse side is equal to the sum of squares”. This theorem can be used to derive the base, perpendicular and hypotenuse formulas

CosK = Adj/Hypo

where the Adj = ?

Hypo = 12 Using pyth. rule to find adj

12² = (√51)² + x²

= 144 = 51 + x²

144-51 = x²

93 = x²

x = √93 = 9.6

Then Applying CosK = Adj/Hypo

CosK = √51/9.6

Cos K = 7.1/9.6

Cosk = 0.7396

Making K the subject of the relation we have

K = cos⁻0.7396

K= 42.3⁰

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The absolute value function as a piecewise function is

Given that

f(x) = |-x^2 + 9x - 18|

When the expression is factored, we have

f(x) = |-(x - 3)(x - 6)|

Set the expression in the absolute bracket to 0

This gives

-(x - 3)(x - 6) = 0

When the equation is solved for x, we have

x = 3 and x = 6

These values represent the boundaries of the piecewise function

So, we have

f(x) = -(-x^2 + 9x - 18), x < 3 and x > 6

f(x) = -x^2 + 9x - 18, 3 ≤ x ≤ 6

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