Please solve with workings out

Step-by-step explanation:

A. t-3=18. Tina is 21. Here's your answer.

The correct option is A

The equation that represents this situation is [tex]t-3=18[/tex]. Tina is [tex]21[/tex].

The explanation for the correct option:

Option A:

From the given question:

[tex]t-3=18[/tex]

Adding [tex]3[/tex] both sides in order to solve for [tex]t[/tex]:

[tex]t=18+3[/tex]

  [tex]=21 \ years[/tex]

Therefore, the equation to find the age of Tina is [tex]t-3=18[/tex] and the age of Tina is [tex]21[/tex] years.

Hence, Option (A) is the correct option.

Mean absolute deviation (MAD) is sometimes considered a better approach to handle outliers in a data set than standard deviation because it is less sensitive to extreme values.

The reason for this is that MAD uses absolute differences between each data point and the median of the data set, rather than the squared differences used by standard deviation.

In a data set with extreme values, such as outliers, the squared differences used by standard deviation can significantly inflate the value, leading to a higher estimate of the overall variability in the data. MAD, on the other hand, uses absolute differences, which are not affected by the sign of the difference and thus are less affected by extreme values. Therefore, MAD can be a better measure of variability in a data set that includes outliers.

However, it is important to note that MAD also has some limitations. It is less widely used and less familiar to many analysts than standard deviation, and it has a more complex formula that can be harder to interpret. Additionally, MAD is not as efficient as standard deviation when the underlying distribution is normal, meaning it requires a larger sample size to achieve the same level of precision as standard deviation. Ultimately, the choice between MAD and standard deviation depends on the specific characteristics of the data set and the goals of the analysis.

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Be aware that the other claims are untrue as 80 degrees is the angle B'OA and Triangles ABO and A'B'O are similar triangles are true .

A closed triangle is a two-dimensional plane shape with three angles and three straight sides. Three non-collinear points are connected with straight line segments to create one of the fundamental shapes in geometry. The lengths of the sides can vary depending on the type of triangle, but the sum of the interior angles of a triangle is always 180 degrees. Triangles with all three sides equal, such as equilateral triangles, isosceles triangles, and scalene triangles, are examples of frequent triangle types (where no sides are equal).

given

According to the diagram, the following claims are accurate:

80 degrees is the angle B'OA.

Triangles ABO and A'B'O are similar triangles.

Angle A'B'O and angle ABO are equivalent.

Line segment AB and line segment A'B' are congruent.

Be aware that the other claims are untrue as 80 degrees is the angle B'OA and Triangles ABO and A'B'O are similar triangles are true .

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Therefore, the inverse of f(x) is not a function, as it fails the vertical line test.

One output is produced for one input by a function, a form of rule. The formula y=x2 serves as an illustration of this. A single output for y results from any input for x. Given that x is the input value, it is appropriate to say that y is a function of x.

We can determine if the inverse of f(x) = 8x² + 27 is a function by finding the inverse and checking if it passes the vertical line test.

To find the inverse, we first replace f(x) with y:

y = 8x² + 27

Next, we swap the roles of x and y:

x = 8y² + 27

Solving for y gives:

8y² = x - 27

y² = (x - 27)/8

y = ±√((x - 27)/8)

Notice that we have a ± sign in front of the square root, which means that for each x value, we have two possible y values.

Therefore, the inverse of f(x) is not a function, as it fails the vertical line test.

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16 percentage of the unknown number is 73.6

To solve the problem, we can use the relationship between percentages and multiply/divide by factors of 100.

Let's start by finding the whole number that corresponds to 1% of the unknown number

1% of the number = 4.6

100 times 1% of the number = 100 x 4.6

Whole number corresponding to the unknown number = 460

We can now use this value to find 5% of the unknown number:

5% of the number = 5/100 x the number = (5/100) × 460 = 23

So we have confirmed that the number we found is correct.

Finally, to find 16% of the number, we can use the same approach

16% of the number = 16/100 x the number = (16/100) × 460 = 73.6

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Answer:

Area of the figure=126.5cm²

Step-by-step explanation:

As we can see based on the shape of the figure, we can divide it into a;

→ Triangle

→ Rectangle

Formulas that we need are;

⇒ Area of triangle =1/2×base×height

⇒ Area of rectangle =length × width

Let's solve the area of the triangle first;

Then the area of the rectangle;

Finally, we add the triangle and rectangle together-

Area of Triangle + Area of Rectangle = 38.5cm²+88cm²

Area of the figure=126.5cm²

RevyBreeze

Answer:Get a quadratic function from its roots. Enter the roots and an additional point on the Graph. Mathepower finds the function and sketches the parabola.

Step-by-step explanation:Solve a quadratic equation using the quadratic formula.

Write the quadratic equation in standard form, ax2 + bx + c = 0. Identify the values of a, b, and c.

Write the Quadratic Formula. Then substitute in the values of a, b, and c.

Simplify.

Check the solutions.

Measure of the dispersion of a dataset relative to its mean.

The coefficient of variation is best described as a relative measure of dispersion. It is a measure of the dispersion of a dataset relative to its mean.

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The length of side x in simplest radical form with a rational denominator is equal to 4.472 units.

An isosceles triangle is a triangle with two equal sides. Also, the angles opposite to the two equal sides are also congruent.

According to Pythagoras' theorem, the square on the hypotenuse of a right-angled triangle equals the sum of the squares on the remaining two sides.

So, the length of other side is also equal to [tex]\sqrt{10}[/tex].

Now, lets use Pythagoras theorem to find the length of x.

Length of Hypotenuse is equal to [tex]\sqrt{y^2 + y^2}[/tex]

x = [tex]\sqrt{y^2 + y^2}[/tex]

x = [tex]\sqrt{\sqrt{10}^2+\sqrt{10 ^2} }[/tex]

x = [tex]\sqrt[2]{10+10}[/tex]

x = 4.472 units

Therefore, the length of side x in simplest radical form with a rational denominator is equal to 4.472 units.

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The perimeter of the rectangular bedroom is 116 feet.

We know that the distance between two points (x₁, y₁) and (x₂, y₂) is given by the formula:

d = √(  (x₂ - x₁)² + (y₂ - y₁)²)

Here the corners of the room are at: (21, 18), (21, −7), (−12, −7) and (−12, 18)

Let's find the distances between these points:

d₁ = √(  (21- 21)² + (18 + 7)²) = 25

d₂ = √(  (21 + 12)² + (-7 + 7)²) = 33

d₃ = √(  (-12 + 12)² + (-7 - 18)²) = 25

d₄ =  = √(  (-12 - 21)² + (-7 + 7)²) = 33

The perimeter is the sum of these distances so we will get:

d₁ + d₂ + d₃ + d₄ = 25 + 33 + 25 + 33 = 116

The correct option is the first one.

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The sample consists of the 15 workers selected to participate in the survey.

The population consists of 200  workers.

What is probability?

Simply put, probability measures how probable something is to occur. We can discuss the probabilities of various outcomes, or how likely they are, whenever we are unsure of how an event will turn out. Statistics is the study of events subject to probability.

Out of a group of 200 workers, 15 are chosen to participate in a survey about the number of Miles they drive to work each week.. In this situation the samples consist of the 15 workers selected to participate in the survey.The population consist of 200 workers

SAMPLE: This is a representative part of a population on which a research is about the population is administered

POPULATION: This is the large collection of people or objects that is the focus of a scientific query or research. Often times, the logistics involved in reaching the entire population may be unavailable, so a sample is taken

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Trips will each need to make 6 trips.

Given

Capacity = 10yd³

Dirts = 170 m³

Trucks = 4

Required

Count the trips made by each truck.

To determine how much dirt is in each truck, divide the amount of soil by 4.

Each Truck = 170/4 m³

Each Truck = 42.5 m³

Divide the portion of each truck by capacity of each truck to get the number of trip

Trip = Each Truck / 10yd³

Convert m³ to yd³

Trip =  55.587875/10

Trip =  5.5587875

Approximate:

Trip =  6

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The probability of getting tails on the next toss is 0.5 as the coin is a fair coin and doesn't remember the past results.

The probability of getting heads on a fair coin is 0.50.

The probability of getting tails is also 0.50.

If you toss the coin three times and get heads all three times,

The probability of getting tails on the next toss is 0.5 as the coin is a fair coin and doesn't remember the past results.

A fair coin is a coin where each of the two faces has the same probability of landing on any coin toss. That is, a fair coin will land on tails and heads equally often.

In other words, the probability of getting heads and tails is 0.5.

There are only two possible outcomes of flipping a fair coin.

The probability of each outcome is 0.5.

This is because a fair coin has two equally likely outcomes.

The probability of getting heads on any flip is 0.5.

The same goes for the probability of getting tails on any flip.

This implies that the probability of flipping a fair coin three times and obtaining three heads is

(0.5 x 0.5 x 0.5) = 0.125

Similarly, the probability of flipping a fair coin three times and obtaining three tails is also 0.125.

As each flip is independent, the outcome of the preceding flips does not affect the next flip, and the probability of getting tails on the next toss is 0.5.

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Answer:9.95

Step-by-step explanation:

Answer: 9.95

Step-by-step explanation:

8.42 +1.53=9.95

Answer:

1/12

Step-by-step explanation:

Out of the total number of candies, 1/2 of the pink candies are round.

To find the fraction of the candies that are pink and round, we need to multiply the fractions representing the proportion of pink candies and the proportion of round candies among the pink candies:

pink candies = 5/6

round candies among the pink ones = 1/5

Therefore, the fraction of candies that are pink and round is:

(5/6) x (1/2) x 1/5 = 1/12

So, 1/12 of the candies are pink and round.

The graph of g can be obtained using a horizontal stretch by a factor of 4 and a vertical translation 3 units up of the graph of f.

In Mathematics, the translation of a graph to the left simply means subtracting a digit from the value on the x-coordinate of the pre-image while the translation of a graph upward simply means adding a digit to the value on the y-coordinate (y-axis) of the pre-image.

In Mathematics, a horizontal translation to the left is modeled by this mathematical equation g(x) = f(x + N) while a vertical translation to the positive y-direction (upward) is represented by this mathematical expression g(x) = f(x) + N.

Where:

Based on the information provided about the parent function f, a function that represents g(x) is given by:

g(x) = 4f + N

g(x) = 4x + 3

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Answer:

Step-by-step explanation:

We can use the standard normal distribution to solve this problem by standardizing the score.

z = (x - mu) / sigma

Where:

x = 70 (score we are interested in)

mu = 60 (mean score)

sigma = 7 (standard deviation)

z = (70 - 60) / 7 = 1.43

Using a standard normal distribution table or calculator, we can find the probability that z is greater than 1.43. The probability is approximately 0.0764.

Therefore, the probability that a randomly selected student scored more than 70 on the exam is 0.0764 (or about 7.64%).

A zero vertical asymptote removable discontinuity means that there is a zero of the function at the input value where the vertical asymptote would occur,

A zero of a function occurs when the value of the function is zero. A vertical asymptote of a function occurs when the value of the function becomes unbounded (either positive or negative) as the input approaches a certain value.

A removable discontinuity of a function occurs when there is a hole in the graph of the function at a certain input value, but the function can be made continuous at that point by defining its value at that input.

In the case of a zero vertical asymptote removable discontinuity, this means that there is a zero of the function at the input value where the vertical asymptote would occur, and the function can be made continuous at that input value by defining its value to be the value of the function at that input.

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Answer:

(2, 180)

Step-by-step explanation:

w(x)=-5x^2+20x+160

a=-5 b=20

x=-20/2x(-5)

x=2

w(2)=180

2, 180

The height of the embankment will be 1.125. As the embankment is in cylinder shape shown in figure.

The shape of the well will be cylindrical as shown in the figure below in the image section.

Given that :

Depth (h1) of well = 14m

Radius (r1) of the circular end of well = 3/2 m Width of embankment = 4 m

From the figure, it can be observed that our embankment will be in a cylindrical shape having outer radius, (r2) = 4 + 3/2 = 11/2m

Let the height of the embankment be h2 .

Volume of soil dug from well = Volume of earth used to form the embankment

⇒ π × r1² ×h1 = π × (r2-r1)² ×h2

⇒ π × (3/2)² × 14 = π ×[(11/2)² - (3/2)² × h2]

⇒ 9/4 × 14 = 112/4 × h2

⇒ h2 = 9/8

⇒ h2 = 1.115 m

Therefore the height of the embankment will be 1.125m.

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Certainly, there is a significant difference in the mean amount of e.coli bacteria detected by the two methods for this type of beef. This can be supported statistically by conducting a hypothesis test.

           The null hypothesis ([tex]H_0[/tex]) is that there is no significant difference in the mean amount of E. coli bacteria detected by the two methods. The alternative hypothesis ([tex]H_a[/tex]) is that there is a significant difference in the mean amount of e.coli bacteria detected by the two methods.

          The two-sample t-test can be used to test the hypothesis. The t-test compares the means of two independent groups and determines whether they are significantly different. The t-test assumes that the two samples are normally distributed and have equal variances.

          If the sample sizes are large, then the t-test can still be used even if the samples are not normally distributed.

          The formula for the t-test is:

                   [tex]t = (x_1 - x_2) / [s^2(1/n_1 + 1/n_2)][/tex]

       Where:

                     [tex]x_1[/tex] = the sample mean for method 1

                     [tex]x_2[/tex] = the sample mean for method 2

                     [tex]s^2[/tex] = the pooled variance of the two samples

                     [tex]n_1[/tex] = the sample size for method 1

                     [tex]n_2[/tex] = the sample size for method 2

        The t-value can then be compared to the critical value of  [tex]t[/tex] for the desired level of significance (usually 0.05).

         If the t-value is greater than the critical value of [tex]t[/tex], then the null hypothesis can be rejected and it can be concluded that there is a significant difference in the mean amount of E. coli bacteria detected by the two methods.

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Since the linear model y = 11x + 41 can be used to represent the data when x≥0, the two statement which best describe the value 41 include the following:

B. initial number of students in attendance when x = 0.

E. y-intercept.

In Mathematics, the slope-intercept form of the equation of a straight line is represented by this mathematical expression;

y = mx + c

Where:

Based on the information, an equation that models the line is given by this mathematical expression;

y = mx + c

y = 11x + 41

By comparison, we have the following:

mx = 11x

Slope, m = 11.

Initial number or y-intercept, c = 41.

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Answer:

2*22/7/27+1

Step-by-step explanation:

2*22/7*27+1

2*(594+1)/7

2*595/7

2*85

170 ans..

Therefore, the height of each tent pole is approximately 8.07 meters.

Trigonometry is a branch of mathematics that deals with the study of the relationships between the sides and angles of triangles. It is used to solve problems involving triangles, such as finding the length of a side or the measure of an angle. Trigonometry is based on the use of trigonometric functions, which are ratios of the sides of a right triangle.

Here,

We can use trigonometry to solve this problem. Let's call the height of the tent pole "h" and the length of the rope "r". Then, we can use the tangent function to find the height:

tan(52°) = h/r

Rearranging this equation, we get:

h = r * tan(52°)

We know that the length of each rope is equal, so we can choose any arbitrary length for r. For simplicity, let's assume that each rope is 10 meters long. Then, we can plug in the values into the equation:

h = 10 * tan(52°)

Using a calculator, we get:

h ≈ 8.07 meters

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Answer:

Step-by-step explanation:

We know that

To now how many pounds will be in each bag, we have to divide

[tex]3 \ lb \div12 \ bags =0.25 \ lb/bag[/tex]

This means that May will have 0.25 pounds per bag, that is, a quarter pound of raisin in each bag.

If we divide this using the long method, we would have to add a zero to "3", because 3 is less than 12, so we have to transform it from "3" to "30". To be able to do that, we have to add a decimal point to the quotient, and then continue with the division.

The probability of getting exactly 2 tails in 7 flips of a coin with a probability of tails being 3/4 is 189/16384 or approximately 0.0115.

We can use the binomial distribution formula to solve this problem. Let X be the number of tails that come up in 7 flips of the coin. Then X follows a binomial distribution with n = 7 and p = 3/4 (since the probability of tails is 3/4).

The probability of getting exactly 2 tails is given by:

P(X = 2) = (7 choose 2) * (3/4)^2 * (1/4)^5

= (21 * 9/16 * 1/1024)

= 189/16384

So the probability that George flips exactly 2 tails is 189/16384, or approximately 0.0115.

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Equations are collections of two or more statements with equal signs.

I must locate the solution that the hanger diagram matches. [tex]3x=4[/tex] is the equation that fits the hanger diagram. Thus, option C is correct.

The hanger shows a total weight of 7 units on one side that is balanced with 3 equal, unknown weights and a 1-unit weight on the other.

Two or more expressions containing equal signs are called equations. I need to find the equation that corresponds to the hanger diagram. The hanger model is a visual representation of the equation.

Both sides must have the same weight to keep the hanger balanced. Like scales and barbells. There are 3 x on the left side of the hanger and 4 x on the right side.

So [tex]3x=4[/tex]  is an equation that satisfies the given trailer diagram.

So option C is correct.   [tex]3x=4[/tex] is the equation that fits the hanger diagram.

From the diagram we have,

Left=x+x+x

Right [tex]=1+1+1+1[/tex]

This gives

Left=[tex]3x[/tex]

Right [tex]=4[/tex]

Therefore, the equation [tex]3x =4[/tex]

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