Can someone pls help if they can:)

These matrices have various dimensions, making it difficult to determine their total. Because of this, the sum of these matrices is either undefinable or unattainable.

Due to their various dimensions, it is difficult to find the sum of these matrices.

One row and three columns make up the second matrix, whereas two rows and one column make up the first matrix. Two matrices can only be added if they share the same dimensions. To be more precise, two matrices can only be added if they have the same number of rows and columns.

The matrices [3 -8] and [4 -5 -6] cannot be added together since they have different numbers of rows and columns. Because of this, the sum of these matrices is either undefinable or unattainable.

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Using the discriminant of the given equation 5x - 9x² + 6 = 0 which is 241, we can say that the the equation has two real and distinct solutions.

The mentioned equation is 5x - 9x² + 6 = 0. Now we have to find the discriminant of the equation.

Discriminant: ax² + bx + c = 0 is b² - 4ac. The discriminant is used to determine the nature of the roots of the quadratic equation. It can be categorized as the following: If b² - 4ac > 0, the quadratic equation has two real and distinct roots.If b² - 4ac = 0, the quadratic equation has one real and repeated root.If b² - 4ac < 0, the quadratic equation has no real roots or two complex roots.

In the given equation 5x - 9x² + 6 = 0, the coefficients are as follows:

a = -9, b = 5, and c = 6.

Now, we can find the discriminant: Discriminant = b² - 4ac= (5)² - 4(-9)(6)= 25 + 216= 241.

Thus, the discriminant of the given equation is 241. As the discriminant is greater than 0, the quadratic equation has two real and distinct roots.

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Answer: 3π

Step-by-step explanation:

360 - 90 = 270°

Perimeter of full circle = πd = 4π

Arc length = [tex]\frac{270}{360}[/tex] × 4π = 3π

The value of r(s(4)) is -33.

What is a function?

In mathematics, a function is a relation between a set of inputs (the domain) and a set of possible outputs (the codomain) with the property that each input is related to exactly one output.

To find the value of r(s(4)), we first need to find the value of s(4), and then use that as the input for the function r.

To find s(4), we substitute x = 4 into the expression for s(x):

s(4) = 3(4) - 1 = 12 - 1 = 11

Now that we have the value of s(4), we can use it as the input for the function r:

r(s(4)) = r(11) = -3(11) = -33

Therefore, the value of r(s(4)) is -33.

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Answer:

v = 110

Step-by-step explanation:

The big line is a 180 degree line. We need to find the value of the missing side so we take 70 degrees and subtract it from the total angle 180 degrees. That leaves us 110 degrees, so v = 110 degrees.

Answer:

[tex](250*50-102)+152[\tex]

The correct mean of the 50 observations is 249.96.

To find the correct mean, we need to adjust the value that was wrongly copied. The difference between 152 and 102 is 50, so the corrected total of the 50 observations would be:

Corrected total = (original total - 102) + 152

= [tex](250*50-102)+152[/tex]

= [tex]12498[/tex]

Therefore, the correct mean of the 50 observations is:

Correct mean = Corrected total / Number of observations

= [tex]12498 / 50[/tex]

= 249.96

Hence, the correct mean of the 50 observations is 249.96.

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Answer:

To solve this problem, we can use the formula for exponential decay:

m = m0(1 - r)^t

where:

m0 = initial mass (300 grams)

r = decay rate (6% per day, or 0.06)

t = time in days

We want to find the mass at the beginning of the 16th day, so t = 15:

m = 300(1 - 0.06)^15

m ≈ 107.4

Therefore, the mass of the radioactive sample at the beginning of the 16th day of the experiment is approximately 107.4 grams.

A right triangle at the base of the a spherical structure with such a height of twenty centimeters (cm) has a lateral area of [tex]= 416 cm^2[/tex].

There are 6 vertices, 9 edges, and 5 faces in a triangular prism. It contains 3 rectangle faces as addition to a pair of triangle-shaped faces. It is a polyhedron. The two triangle-shaped bases are parallel to one another.

A three-dimensional form with flat sides is referred to as a prism. It features two identically shaped and sized ends. From one end of the form to the other, it shares a comparable cross-section.

The triangle base's perimeter must be determined. The length of all 3 sides are added to determine the perimeter:

[tex]8 + 15 + 17 = 40[/tex]

The lateral area is,

[tex]2(8 * 20) + 2(15 * 20) + 2(17 * 20)[/tex]

[tex]= 416 cm^2[/tex]

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Use the formula A = one-half b h to find the area of the base. The area of the base, A, is One-half (8) (14) = 56 meters. The volume of the prism, V is (56) (7) = 392 meters cubed.

A prism is a solid figure having two bases that are the same in size and shape, flat sides, and a continuous cross-section. The two bases of a prism, which might be triangles, rectangles, or any other polygon, determine the name of the prism in question. Prisms having triangle bases, for instance, are referred to as triangular prisms, whereas those with square bases are referred to as square prisms, and so on. Three rectangle lateral sides and two triangular bases make up a triangular prism.

Given that the figure is a right triangular prism with, base 8 meters and 14 m, also the height of the prism is 7 m.

Thus, the correct steps to calculate the volume of the right triangular prism are:

Use the formula A = one-half b h to find the area of the base.

The area of the base, A, is One-half (8) (14) = 56 meters.

The volume of the prism, V is (56) (7) = 392 meters cubed.

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Angle between vector a and vector b is 0 degrees or 180 degrees.

What is vector?

A vector is a quantity that not only indicates magnitude but also indicates how an object is moving or where it is in relation to another point or item. Euclidean vector, geometric vector, and spatial vector are other names for it.

In mathematics, a vector's magnitude is defined as the length of a segment of a directed line, and the vector's direction is indicated by the angle at which the vector is inclined.

What is scalar quantity?

Physical quantities with merely magnitude and no direction are referred to as scalar quantities. These physical quantities can be explained just by their numerical value without any further guidance. These physical values can be added according to the basic algebraic rules, and in this case, only their magnitudes are added.

GIVEN:

If vector a is equal to k (scalar quantity)times vector b.

then vector a and vector b are parallel to each other.

The angle between two parallel vectors is 0 degrees or 180 degrees.

So, the angle between vector a and vector b is

0 degrees or 180 degrees.

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[tex]\textit{volume of a cone}\\\\ V=\cfrac{\pi r^2 h}{3}~~ \begin{cases} r=radius\\ h=height\\[-0.5em] \hrulefill\\ r=12\\ V=1281.12 \end{cases} \implies 1281.12=\cfrac{\pi (12)^2 h}{3} \\\\\\ (3)(1281.12)=144\pi h\implies \cfrac{(3)(1281.12)}{144\pi }=h\implies 8.50\approx h[/tex]

The volume of the triangular prism is 32.8 m³.

What is volume?

A volume is simply defined as the amount of space occupied by any three-dimensional solid. These solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Different shapes have different volumes.

To find the volume of the triangular prism, we need to use the formula:

Volume = (Area of base) x Height

We are given the surface area of the prism, which includes the area of all five faces. However, we only need the area of the two triangular faces, since the base of the prism is a triangle.

The area of a triangle is given by the formula:

Area = (base x height) / 2

Substituting the given values, we have:

Area of each triangular face = (4.1 m x 2 m) / 2 = 4.1 m²

The total area of the two triangular faces is therefore:

2 x 4.1 m² = 8.2 m²

Now, we can use the formula for the volume of a prism:

Volume = (Area of base) x Height

Substituting the given values, we have:

Volume = (8.2 m²) x 4 m = 32.8 m³

Therefore, the volume of the triangular prism is 32.8 m³.

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(a) The exploratory factor analysis (EFA) can be useful in two ways: Dimensional Reduction: The dimensionality of a set of data can be reduced by exploratory factor analysis. Rather than dealing with several variables, it identifies the basic factors that describe the data set. This can be achieved by extracting factor information that shows the covariance structure of the variables that underlie the observations. Investigation of latent variables: Exploratory factor analysis can be used to determine whether an underlying dimension, such as depression or anxiety, underlies a collection of observable variables, such as feelings of depression, nervousness, or irritability. Latent variables are those that cannot be observed directly. (b) Factor analysis and principal component analysis are two techniques for data reduction that are frequently confused. The principal component analysis, on the other hand, is a technique that creates uncorrelated variables to replace the original variables. It can be viewed as a special case of factor analysis in which all of the extracted factors are used. It includes the raw data's total variance, which is defined by a few components. Principal component analysis is a method of data reduction that extracts uncorrelated factors from the original variables. The correlation structure of the original variables is utilized in factor analysis to define the underlying factors.

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For Mike's Bakery the total expenses will be $3528 and the total receipts will be $3920  and it will take 392 hours.

Let number of hours the bakery needs to operate in order to make back the amount it invested in equipment be = "h".

To find "h", we need to find the profit per hour,

The profit per hour is = difference between hourly receipts and hourly operating costs;

Profit per hour = Hourly receipts - Hourly operating costs

Profit per hour = $10 - $9

Profit per hour = $1

The total profit required to make back the $392 investment is = $392,

We know that,

⇒ Total profit = (Profit per hour) × (Number of hours)

⇒ $392 = $1 × h

⇒ h = $392/$1

⇒ h = 392

So, bakery needs to operate for 392 hours to make back the amount it invested in equipment.

To calculate the total expenses and receipts, we can use the following formulas:

⇒ Total expenses = (Operating costs) × (Number of hours)

⇒ Total expenses = $9 × 392

⇒ Total expenses = $3528

⇒ Total receipts = (Hourly receipts) × (Number of hours)

⇒ Total receipts = $10 × 392

⇒ Total receipts = $3920

Therefore, the total expenses is $3528 and total receipts is $3920.

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The difference in the average rate of change of Chris' savings and Lily's savings in the period from Month 3 to Month 12 is given as follows:

A. $5.

The average rate of change of a function is given by the change in the output of the function divided by the change in the input of the function. Hence we must identify the change in the output, the change in the input, and then divide then to obtain the average rate of change.

Chris savings increased from 35 to 170 in the period from Month 3 to Month 12, hence the average rate of change is given as follows:

(170 - 35)/9 = $15.

Lily's Savings increased from 30 to 120 in the period from Month 3 to Month 12, hence the average rate of change is given as follows:

(120 - 30)/9 = $10.

Hence the difference is of:

15 - 10 = $5.

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Answer:

9.6 days

Step-by-step explanation:

100 chickens, 12 days

find the days for 10 chickens: 1.2 days (to get 10 you have to divide 100 by ten, so divide 12 by ten too)

times by 8 to get the days for 80 chickens: 9.6 days

Answer: Let's assume that the bag of corn contains "C" units of corn. We know that this amount of corn can feed 100 chickens for 12 days.

To determine how long the same bag of corn would feed 80 chickens, we can use the following proportion:

(Corn units)/(chickens * days) = (Corn units)/(chickens * days)

We can set up two ratios, one for the original situation and one for the new situation, and then cross-multiply to solve for the unknown value:

C/100 * 12 = C/80 * d

where "d" is the number of days that the same bag of corn would feed 80 chickens.

Simplifying the equation, we get:

C/10 = C/80 * d

Multiplying both sides by 80, we get:

8C = Cd

Dividing both sides by "C", we get:

8 = d

Therefore, the same bag of corn would feed 80 chickens for 8 days.

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The midpoint of the line segment is (-2, 2). The correct answer is F. (-2, 2).

What is the equation of the line?

A linear equation is an algebraic equation of the form y=mx+b. where m is the slope and b is the y-intercept.

The midpoint of a line segment with endpoints (x1, y1) and (x2, y2) is given by the formula:

((x1 + x2)/2, (y1 + y2)/2)

Using this formula, we can find the midpoint of the line segment that has endpoints (-10,-4) and (6,8):

Midpoint = ((-10 + 6)/2, (-4 + 8)/2) = (-2, 2)

Therefore, the midpoint of the line segment is (-2, 2). The correct answer is F. (-2, 2).

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Answer:

72mph

Step-by-step explanation:

To convert km/hr into m/s, simply multiply the speed value by 5/18

To convert 8Km/hr to m/s, multiply 8 by 5/18 or divide by 3.6

8 x 5/18 = 2.22m/s

You can say that 2.22m/s = 5mph since 8km/hr = 5mph

If 2.2m/s =5mph, 1m/s = 5mph/ 2.2 (Divide both sides by 2.2)

Then 32m/s = 5mph/2.2 x 32

2.25 x 32 = 72 mph

Using the conversion, 32 m/s is equivalent to 72 mph.

We have,

To convert 32 m/s to mph using the conversion factor 8 km/h = 5 mph,

We can follow these steps:

- Convert 32 m/s to km/h by multiplying by the conversion factor:

32 m/s x (3.6 km/h / 1 m/s) = 115.2 km/h

- Convert 115.2 km/h to mph using the conversion factor 8 km/h = 5 mph:

115.2 km/h x (5 mph / 8 km/h) = 72 mph

Therefore,

Using the conversion, 32 m/s is equivalent to 72 mph.

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The system of equations solved by elimination has its solution to be (2, 2)

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

-3x + 4y = 2

3x + 6y = 18

When the above equations are added, the variable x is eliminated

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

4y + 6y = 2 + 18

Evaluate

10y = 20

So, we have

y = 2

Recall that

-3x + 4y = 2

So, we have

-3x + 8 = 2

Evaluate

-3x = -6

Divide

x = 2

Hence, the solution is (2, 2)

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As per the given question, the length of the square shed is 8 meters.

Length of the sheet = 4m

Width of the sheet = 16m

A rectangle is a sort of quadrilateral with parallel sides that are equal to one another and four vertices that are all 90 degrees apart. Since a rectangle's opposite sides are both equal and parallel, a parallelogram is another name for this geometric shape.

Using the formula for the area of the rectangle -

Area = Length x Width

Now,

Let the length of the square shed be x, therefore -

x² = 4(16) = 64

x = √64

= 8

Complete Question:

Two storage sheds are to have the same area. One is square and one is rectangular. The rectangular she is 4 meters wide and 16 meters long. What is the length of the square shed?

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The volume of the hemisphere with diameter 9 is approximately 76.0435 cubic units.

What is hemisphere ?

A hemisphere is a three-dimensional geometric shape that consists of half of a sphere. It is formed by slicing a sphere into two equal parts along a plane that passes through its center. The term "hemisphere" comes from the Greek words "hemi," meaning half, and "sphaira," meaning sphere.

A hemisphere has a curved surface that is a portion of a sphere's surface, as well as a flat circular base that is formed by the plane of the cut. The diameter of the base is equal to the diameter of the original sphere, and the radius is half of the diameter.

To find the volume of the hemisphere, we first need to know its formula. A hemisphere is half of a sphere, so its volume is half of the volume of a sphere with the same radius.

The formula for the volume of a sphere is:

V = (4/3)πr³

where V is the volume and r is the radius.

Since the hemisphere has diameter 9, its radius is half of the diameter, which is:

r = 9/2 = 4.5

Substituting the value of r in the formula for the volume of a sphere, we get:

V = (4/3)π(4.5)³

V = (4/3)π(91.125)

V = 152.087

Since the hemisphere is half of a sphere with radius 4.5, its volume is half of the volume of that sphere, which is:

V_hemisphere = (1/2)V_sphere

V_hemisphere = (1/2)(4/3)π(4.5)³

V_hemisphere = 76.0435

Therefore, the volume of the hemisphere with diameter 9 is approximately 76.0435 cubic units.

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The answer of the given question based on perimeter of trapezoid the ratio will be  x:y is 8:5.

A trapezoid is quadrilateral with at least one pair of the parallel sides. The parallel sides are called  bases of  trapezoid, and  non-parallel sides are called legs.

Let's denote the lengths of the four sides of Trapezoid 1 as a, b, c, and d, and the lengths of the corresponding sides of Trapezoid 2 as m, n, p, and q, respectively. Then we have:

a + b + c + d = 240 (perimeter of Trapezoid 1)

m + n + p + q = 150 (perimeter of Trapezoid 2)

Since Trapezoid 1 and Trapezoid 2 are similar, we can write:

m = ax

n = bx

p = cy

q = dy

where x and y are the ratios of the longer and shorter bases of Trapezoid 1 to Trapezoid 2, respectively.

Substituting these expressions into the equations for the perimeters of the trapezoids, we get:

a(x+y) + b(x+y) + c(x+y) + d(x+y) = 240

(ax+bx+cy+dy) = 150

Simplifying these equations, we get:

(a+b+c+d)(x+y) = 240

(a+b+c+d)(x+y)(x/y) = 150

by Dividing  second equation by  first, we will get:

x/y = 240/150 = 8/5

Therefore, the ratio x:y is 8:5.

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The set of points that includes all of the solutions for [tex]y = 5/2x + 3/2[/tex] is [tex](x, 5/2x + 3/2)[/tex] for all real numbers.

The set of points that includes all of the solutions for the given equation is [tex](x, 5/2x + 3/2)[/tex] for all real numbers. This is because any point on this line will satisfy the equation [tex]y = 5/2x + 3/2[/tex], which means that any solution to the equation will be included in this set of points.

Alternatively, we can find the equation of the line passing through the points (-1, -1) and (1, 4) and confirm that it is the same as the equation [tex]y = 5/2x + 3/2[/tex].

Using the two-point form of a linear equation, the slope of the line passing through the two points is:

[tex]m = (y2 - y1) / (x2 - x1) = (4 - (-1)) / (1 - (-1)) = 5/2[/tex]

Using the point-slope form of a linear equation with the slope and one of the points:

[tex]y - y1 = m(x - x1)[/tex]

[tex]y - (-1) = (5/2)(x - (-1))[/tex]

[tex]y + 1 = (5/2)(x + 1)[/tex]

[tex]y = (5/2)x + (5/2) - 1[/tex]

[tex]y = (5/2)x + (3/2)[/tex]

This is the same equation as [tex]y = 5/2x + 3/2[/tex], so we know that the set of points that includes all of the solutions is [tex](x, 5/2x + 3/2)[/tex] for all real numbers.

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Answer:

  115°

Step-by-step explanation:

You want the measure of angle S opposite angle (4x+5)° in an inscribed quadrilateral in which the other two angles are (5x-2)° and (7x+2)°.

The measure of an inscribed angle is half the measure of the arc it intercepts.

Two opposite angles in an inscribed quadrilateral intercept arcs that total the full circle.  Since the sum of double those angles is 360°, the sum of opposite angles of an inscribed quadrilateral is 180°—they are supplementary.

We can use this to find the value of x:

  (5x -2)° +(7x +2)° = 180°

  12x = 180 . . . . . . simplify

  x = 15 . . . . . . . divide by 12

Now, the angle opposite S can be found to be ...

  (4x +5)° = (4·15 +5)° = 65°

Angle S is the supplement of this:

  S = 180° -65°

  S = 115°

Answer:

C) trapezoid

Step-by-step explanation:

See attached image.  The shape formed from the lines is a trapezoid, for the reasons listed.

Answer:

  66

Step-by-step explanation:

You want the remainder from (x^10 +2x^9 +3x^8 +...+10x +11)/(x -1).

The remainder from dividing polynomial f(x) by (x-a) is the value f(a). Here, that means we can find the remainder by evaluating (x^10 +2x^9 +3x^8 +...+10x +11) for x=1. When we do that, we see the value is simply the sum of the coefficients:

  f(1) = (1 + 2 + 3 + ... + 10 + 11) = (11)(11 +1)/2 = 66

The remainder from dividing by (x-1) is 66.

__

Additional comment

The sum of integers 1..n is (n)(n+1)/2.

[tex]\textit{arc's length}\\\\ s = \cfrac{\theta \pi r}{180} ~~ \begin{cases} r=radius\\ \theta =\stackrel{degrees}{angle}\\[-0.5em] \hrulefill\\ r=8\\ \theta =90 \end{cases}\implies s=\cfrac{(90)\pi (8)}{180}\implies s=4\pi[/tex]

Answer:

Step-by-step explanation: