Please show all steps and if using identities of any kind please
be explicit... I really want to understand what is going on here
and my professor is useless.
2. Ordinary least squares to implement ridge regression: Show that by using X = X | XI (pxp) [0 (PX₁)], we have T T BLS= ÂLs = (X¹X)-¹Ỹ¹ỹ = Bridge. =

9/10 or 0.9

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The expression (12x +2)/ 25 = (10x+2)/21 can be simplified so that the value of x= 2.

The concept that will be used here is simplification. To simplify simply means to make anything easier. In mathematics, simplifying an equation, fraction, or problem means taking it and making it simpler. Calculations and problem-solving techniques simplify the issue.

We were given,  (12x +2)/ 25 = (10x+2)/21

then we can cross multiply as :

252x +42 = 250x +50

Then we collect the like terms as:

252x- 250x   = 50 - 42

2x = 8

x=4

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complete question:

simplify the expression and find the value of x?

If you ate 2.5 cups of the particular cereal, you would be consuming 475 calories and 17.5 grams of fiber.

This information can be found in the given nutrition facts, which state that a single serving contains 190 calories and 7 grams of fiber.

Since 2.5 cups is equivalent to approximately 5 servings, we can simply multiply the values by 5 to determine the total amount of calories and fiber in 2.5 cups.

Therefore, 5 servings of the cereal would provide 950 calories (190 x 5) and 35 grams of fiber (7 x 5).

Thus, 2.5 cups (or half of 5 servings) would provide half of the total amount of calories and fiber in the entire 5 servings.

Hence, 2.5 cups would provide approximately 475 calories (950 ÷ 2) and 17.5 grams of fiber (35 ÷ 2).

Therefore, if you ate 2.5 cups of this particular cereal, you would be consuming 475 calories and 17.5 grams of fiber.

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Answer

A ratio obtained by multiplying or dividing the numerator and denominator of a given ratio by the same number is called an equivalent ratios.

Hope this helps you ;]

Step-by-step explanation:

The value of the side x is 7. 071

It is important to note that there are six different trigonometric identities with their ratios.

They are;

sin θ = opposite/hypotenuse

cos θ = adjacent/hypotenuse

tan θ = opposite/adjacent

From the information given, we have that;

The side ,'x' is the hypotenuse side

The side '5' is the opposite side

Using the sine identity, we have;

sin 45 = 5/x

cross multiply the values

x = 7. 071

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Answer:

5.50 Each

Step-by-step explanation:

Answer:

Step-by-step explanation:

3P + 4N = 28

6P+ 8N = 56

4P +8N  52

2P     = 4

P = 4/2 = 2  = $2

3(2)+4N = 28

4N = 28-6=22

N = 22/4 = 5.5= $5.50= cost of one notebook

Answer:

your answer is 5.45 that is your answer

The number of 9 bright fringes is seen in the central maximum that spans the distance between the first missing order is 5 on one side and the first missing order on the other side

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions.

Blue laser light with a wavelength of 450 nm illuminates two 50-m-wide slits positioned 0.25 mm apart. On a screen 2.0 m behind the slits, the interference pattern is visible.

For dark fringe, the equation as:

yp = p  λ L / d

for p =1

yp = λ× L/a

For bright fringe, the equation as:

ym = m  λL / d

from (i) and (ii)

For missing order, the equation as:

ym = yp

m λL / d = λ× L/a

m=d/a

m = 0.25×10⁻³/ (50×10⁻⁶)

m=5

The number of bright fringes, the equation as:

N-1=2(m-1)

N-1 = 2×4

N = 8 + 1

N=9

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The original slope's reciprocal will be the opposite of the perpendicular slope. To determine the intercept, b, enter the supplied point and the new slope into the slope-intercept form (y = mx + b). Rewrite the following equation in standard form: ax + by = c.

The values of the slope and y-intercept provide details on the relationship between the two variables, x and y. The slope shows how quickly y changes for every unit change in x. When the x-value is 0, the y-intercept shows the y-value.

Y = mx + b, where m denotes the slope and b the y-intercept, is how the equation of the line is expressed in the slope-intercept form. We can see that the slope of the line in our equation, y = 6x + 2, is 6.

The slope is m and the y-intercept is b in the equation y=mx+b in slope-intercept form. Some equations can also be rewritten so that they resemble slope-intercept form. For instance, y=x can be written as y=1x+0, resulting in a slope and y-intercept of 1 and 0, respectively.

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Mathematical approaches to aggregate planning involve using quantitative methods to determine the optimal production and resource allocation strategies over a specified planning horizon. These approaches utilize mathematical models to optimize various factors such as production costs, inventory levels, and customer demand.

One mathematical approach to aggregate planning is linear programming, which formulates the planning problem as a linear optimization model. Linear programming considers constraints such as capacity limits, labor availability, and demand variability to find the best allocation of resources and production levels. The objective is to minimize costs or maximize profit while meeting demand requirements.

Another approach is the use of mathematical forecasting techniques to predict future demand. Time series analysis, regression analysis, and other statistical methods can be employed to forecast demand patterns. These forecasts serve as inputs to mathematical models, such as inventory control models or production planning models, which determine the optimal production levels and inventory policies based on the anticipated demand.

Simulation modeling is another mathematical approach where computer-based simulations are used to evaluate different scenarios and make decisions about production levels, inventory levels, and workforce scheduling. These models consider various factors like demand variability, production capacity, and resource availability to simulate the system's behavior and analyze the impact of different planning strategies.

Overall, mathematical approaches to aggregate planning provide a systematic and quantitative way to optimize production and resource allocation decisions, considering factors such as demand, capacity, costs, and constraints. These approaches help organizations make informed decisions to meet customer demand efficiently while minimizing costs and maximizing operational performance.

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Given that,

Length of a chord = 28 inches

Radius of the circle = 50 inches

To find,

The distance the chord from the center of the circle.

Solution,

Let the distance from the chord to the centre of circle is x.

It is denoted by OM.

Using Pythagoras theorem to find it.

\(50^2=28^2+x^2\\\\x=\sqrt{50^2-28^2} \\\\x=41.42\ \text{inches}\)

So, the distance from the chord to the centre of circle 41.42 inches

Answer:

5

Step-by-step explanation:

(x times 3) minus 3

12 plus 3 is 15

15 divide by 3 is 5

Answer: 5

Step-by-step explanation:

5x3=15

15-3=12

The probability that a randomly selected elementary school teacher earns more than $555 a week is approximately 0.8238 or 82.38%.

We can use the standard normal distribution to solve this problem by standardizing the value of $555 and finding its corresponding probability.

The standardized value of $555 is:

z = (x - μ) / σ = (555 - 595) / 43 = -0.93

where x is the weekly salary we're interested in, μ is the mean weekly salary, and σ is the standard deviation of weekly salaries.

We can now look up the probability of a standard normal random variable being greater than -0.93 in a standard normal distribution table, or use a calculator or statistical software. The probability is approximately 0.8238.

Therefore, the probability that a randomly selected elementary school teacher earns more than $555 a week is approximately 0.8238 or 82.38%.

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Answer:

Step-by-step explanation:

Simplifying

5x + -4 = 40

Reorder the terms:

-4 + 5x = 40

Solving

-4 + 5x = 40

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '4' to each side of the equation.

-4 + 4 + 5x = 40 + 4

Combine like terms: -4 + 4 = 0

0 + 5x = 40 + 4

5x = 40 + 4

Combine like terms: 40 + 4 = 44

5x = 44

Divide each side by '5'.

x = 8.8

Simplifying

x = 8.8

Answer is:

2018

Have a good day :D

The Heaviside step function, often denoted as u(t), is a mathematical function that represents a unit step at t = 0. It is defined as follows:

u(t) = 0, for t < 0

u(t) = 1, for t ≥ 0

It is a piecewise-defined function that jumps from 0 to 1 at t = 0. It is widely used in engineering, physics, and mathematics to model sudden changes or switches in a system.

Examples of the Heaviside step function:

Shifted Heaviside step function:

u(t - a) represents a step function that occurs at t = a instead of t = 0. It has the same properties but is shifted along the time axis.

Scaled Heaviside step function:

b * u(t) represents a step function that is scaled by a factor of b. It jumps from 0 to b at t = 0.

Summed Heaviside step function:

u(t - a) + u(t - b) represents a combination of two shifted step functions occurring at different times a and b. It can be used to model systems with multiple switches or events.

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The height of the box is approximately 25.98 inches.

To find the height of the box, we can use the formula for the surface area of a rectangular prism:

Surface Area = 2lw + 2lh + 2wh

We are given that the surface area is 1,803.4 inches^2, the length is 23.5 inches, and the width is 12.4 inches. Let's substitute these values into the formula and solve for the height:

1,803.4 = 2(23.5)(12.4) + 2(23.5)h + 2(12.4)h

Simplifying the right-hand side of the equation, we get:

1,803.4 = 582.8 + 47h

Subtracting 582.8 from both sides, we get:

1,220.6 = 47h

Dividing both sides by 47, we get:

h ≈ 25.98

Therefore, the height of the box is approximately 25.98 inches.

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Answer:

i believe it is grid D

Step-by-step explanation:

if you look at grid D there is 10 little squares in each row you count by 10s there's 58 3 times on the grids. if i am wrong im sorry but hopefully this helps

Answer: Subtraction Property

Step-by-step explanation:

For all real numbers x, y and z  

if x = y

then x − z = y − z

please give me a brainliest answer

Answer:

32°

Step-by-step explanation:

Its pretty strait forward.

2x + 60° + 3x - 40° = 180°

5x + 20° = 180°

5x = 160°

x = 160°/5

x = 32°

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Answer:

0.35

Step-by-step explanation:

we know that,

1 pound= 16 ounce

so,16 ounce strawberries cost's=5.60$

∴1 ounce strawberry cost's=5.60/16$

                                           =0.35$

Answer:

75-3.5y-4y=4y+6

75-7.5y=4y+6

69=11.5y

6=y

Step-by-step explanation:

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Answer:

\(75-3.5y-4y=4y+6\\75-7.5y=4y+6\\75-11.5y=6\\-11.5y=-69\\y= 6\)

Step-by-step explanation:

then we need to solve the second equation for k

then the answer is C.

Using a standard normal distribution table, we can find that the percentage of values below a z-score of -1.6 is approximately 5.0%. Therefore, we can say that Carl has a higher GPA than approximately 95% of other students at UTA.

To determine Carl's z-score, we need to know the mean and standard deviation of GPAs at UTA. Without this information, we cannot calculate the z-score. However, we can still determine the percentage of other students at UTA who have a lower GPA than Carl. We can use a standard normal distribution table to find this percentage, assuming that GPAs at UTA are approximately normally distributed.

First, we need to calculate the z-score corresponding to Carl's GPA of 2.2. Assuming a mean GPA of 3.0 and a standard deviation of 0.5, we can use the formula: z = (x - μ) / σ

where x is Carl's GPA, μ is the mean GPA, and σ is the standard deviation. Plugging in the values, we get:

z = (2.2 - 3.0) / 0.5 = -1.6

Using a standard normal distribution table, we can find that the percentage of values below a z-score of -1.6 is approximately 5.0%. Therefore, we can say that Carl has a higher GPA than approximately 95% of other students at UTA.

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If two methods agree perfectly in a method comparison study, the slope equals 1.0 and the y-intercept equals 0.0. Therefore, option (b) is the correct answer.

In a method comparison study, the goal is to compare the agreement between two different measurement methods or instruments. The relationship between the measurements obtained from the two methods can be described by a linear equation of the form y = mx + b, where y represents the measurements from one method, x represents the measurements from the other method, m represents the slope, and b represents the y-intercept.

When the two methods agree perfectly, it means that there is a one-to-one relationship between the measurements obtained from each method. In other words, for every x value, the corresponding y value is the same. This indicates that the slope of the line connecting the measurements is 1.0, reflecting a direct proportional relationship.

Additionally, when the two methods agree perfectly, there is no systematic difference or offset between the measurements. This means that the line connecting the measurements intersects the y-axis at 0.0, indicating that the y-intercept is 0.0.

Therefore, in a perfect agreement scenario, the slope equals 1.0 and the y-intercept equals 0.0, which corresponds to option (b).

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Answer:160

Step-by-step explanation:

3:1 the difference is 2 right now

80/2=40

multiply both sides by 40 to get 120:40

120-40=80

120+40=160