Eliana puts $20.50 in her savings account every week for 25 weeks leading up to Christmas. How much money does she have to spend on Christmas presents?

So the value of integral [tex]\int\limits^4_1 {\frac{x}{x^2+13} } \, dx[/tex] is 0.51

An integral is a mathematical concept used to calculate area or change over an interval, represented by ∫. It is opposite of derivative, with two types: definite and indefinite. Used in many areas of mathematics and physics.

The integral of x/(x^2+13) from x=1 to x=4 can be evaluated using the method of substitution.

Let u = x^2+13, then du/dx = 2x dx

so x dx = du/2

now the integral becomes 1/2 * integral (1/u) du

so intergral is 1/2* [tex]\int\limits {\frac{1}{u} } \, du[/tex]

=> 1/2 [tex]\left \{ {{x=4} \atop {x=1}} \right.[/tex] ln([tex]x^2[/tex]+13)

=> 0.5 ( ln(39)-ln(14))

=>0.51

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Complete question:

evalute integral [tex]\int\limits^4_1 {\frac{x}{x^2+13} } \, dx[/tex]

The ratio of the area of a circle to the area of a square with sides of length equal to the circle's diameter is π/4.

This can be expressed mathematically as A_circle/A_square = π/4, where A_circle is the area of the circle and A_square is the area of the square.

To calculate the area of the circle, use the formula A_circle = πr^2, where r is the radius of the circle. To calculate the area of the square, use the formula A_square = (d^2)/4, where d is the diameter of the circle. Therefore, the ratio of the area of the circle to the area of the square is A_circle/A_square = πr^2/(d^2/4) = 4πr^2/d^2.

For example, if the radius of the circle is 4 cm, then the diameter is 8 cm, and the ratio of the area of the circle to the area of the square is A_circle/A_square = 4π(4^2)/(8^2) = 16π/64 = π/4.

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Answer:

79 degree

Step-by-step explanation:

A triangle is 180 degrees

We know that angle D and F is equal to each other

180 - 22 = 158 degree

158 / 2 = 79 degree

So, m<F = 79 degree

Answer:

v/202

Step-by-step explanation:

formula: leg² + leg² = hyp²

11² + 9² = hyp²

121 + 81 = hyp²

202 = hyp²

v/202 = v/hyp²

hope this makes sense

With a dilation factor of 1 / 4, Polygon ABCD with vertices at A(−4, 6), B(−2, 2), C(4, −2), D(4, 4) would be: A(-1, 1.5), B(-0.5 , 0.5), C(1, -0.5), D(1 , 1). Second option

The solution to the problem would be the solution that is gotten when we divide these points by 1/4. This is the dilation factor

we would have:

A(−4, 6), B(−2, 2), C(4, −2), D(4, 4)

= (-4 * 1/4, 6 * 1/4) , B(-2 * 1/4, 2 * 1/4), C(4 * 1/4, -2 * 1/4), D(4 * 1/4, 4 * 1/4)

= A(-1, 1.5), B(-0.5 , 0.5), C(1, -0.5), D(1 , 1)

Hence the second option is correct.

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Answer:A′(−1, 1.5), B′(−0.5, 0.5), C′(1, −0.5), D′(1, 1).

Step-by-step explanation:

To dilate a point using a scale factor, you multiply both the x-coordinate and the y-coordinate of the original point by the scale factor.

Given the original vertices of the polygon ABCD and a scale factor of one fourth (1/4), we can find the coordinates of the dilated vertices A', B', C', and D':

Original vertex A(-4, 6):

x-coordinate of A': -4 * 1/4 = -1

y-coordinate of A': 6 * 1/4 = 1.5

So, vertex A' is (-1, 1.5).

Original vertex B(-2, 2):

x-coordinate of B': -2 * 1/4 = -0.5

y-coordinate of B': 2 * 1/4 = 0.5

So, vertex B' is (-0.5, 0.5).

Original vertex C(4, -2):

x-coordinate of C': 4 * 1/4 = 1

y-coordinate of C': -2 * 1/4 = -0.5

So, vertex C' is (1, -0.5).

Original vertex D(4, 4):

x-coordinate of D': 4 * 1/4 = 1

y-coordinate of D': 4 * 1/4 = 1

So, vertex D' is (1, 1).

Comparing the calculated coordinates with the options given:

A′(−1, 1.5), B′(−0.5, 0.5), C′(1, −0.5), D′(1, 1)

Among the given options, the correct vertices of polygon A′B′C′D′ are A′(−1, 1.5), B′(−0.5, 0.5), C′(1, −0.5), D′(1, 1).

6 sin² (x) - 5 cos(x) — 7 = 0 for all solutions 0 < x < 2π :  x = π

[tex]& \sin ^2 x-5 \cos x=5 \\[/tex]

[tex]& 1-\cos ^2 x-5 \cos x=5 \\[/tex]

[tex]& \cos ^2 x+5 \cos x+4=0 \\[/tex]

[tex]& \cos ^2 x+\cos x+4 \cos x+4=0 \\[/tex]

[tex]& \cos x(\cos x+1)+4(\cos x+1)=0 \\[/tex]

[tex]& (\cos x+1)(\cos x+4)=0 \\[/tex]

[tex]& \cos x+1=0 \quad(\because \cos x \neq-4) \\[/tex]

[tex]& \cos x=-1 \\[/tex]

[tex]& \cos x=\cos \pi \\[/tex]

[tex]& x=(2 k+1) \pi[/tex]

Where, k is any integer i.e  k = 0 ± 1, ± 2, ± 3,....

But x ∈[0,2π)  hence setting k = 0 we get the solution

x = π

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The answer choices which correctly represent equations which model the total yards of fabric Sophie will buy is; x + y = 28, 28 - x = y and 28 - y = x.

It follows from the attached table, where x represents the yards of red fabric she buys and y represents the yards of blue fabric she buys.

It follows that the following x and y pairs are possible; (1, 27), (2, 26), (3, 25) and (4, 24).

On this note, it can be inferred that in each of the red and blue fabric pairs; x + y = 28.

Ultimately, the equations which model the total yards of of fabric Sophie will buy as required are; x + y = 28, 28 - x = y and 28 - y = x.

Complete question; The given answer choices are; x+y=28, 28+x=y, x-y=28, 28-x=y and 28-y=x.

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Answer:

157.5 pounds

Step-by-step explanation:

11.25×12=135 then add 135 to 22.5

The Kilograms of type B that are in one bag of the Latoya's Coffee shop blend would be = 3kg

What is a mixture?

A mixture is defined as the combination of two or more components which can or cannot be separated by ordinary methods.

The coffee blend of LaToya shop = Type A and B

A bag of the coffee blend = 6kg of Type A.

4 bags of coffee blend = 36kg

Therefore 4 bags of coffee blend contains = 6 see×4 = 24 kg of Type A

Type B in each bag = 36 - 24 = 12/4 = 3kg.

We are tasked with finding the amount in kilograms of type B coffee present in a bag of coffee.

We already know that in a bag , there are 4kg of type A coffee. Hence, in 6 bags, what we will be having would be 6 * 4kg = 24kg of type A coffee

The total kilograms of coffee in 6 bags of coffee is 48kg. Now we know we have 24kg of type A, the amount of type B coffee present is thus 48kg -24kg = 24kg

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Answer:

21. 41,281

22. 17,401

23. 682,198

24. 1,795,329

29. 360

30. 335

31. 5,992

25. 78,461

26. 2158

27. 3167029

28. 5955748

32. 1452

33. 612

34. 7141

Your welcome

Answer:

f(x) = 2 + 7.5 sin(x/3 + pi/4)

Step-by-step explanation:

f(x) = 2 + 3 sin(x/3 + pi/4)

  Amplitude: 3

2.5 * 3 = 7.5

Function that has an amplitude that is two and half times the size of the function f(x) = 2 + 3 sin(x/3 + pi/4)

   f(x) = 2 + 7.5 sin(x/3 + pi/4)

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The statements and reasons that are true and can be used in a proof that m∠8  <  m∠6 are:

A) m∠6+m∠2+ m∠3 = 180° because the sum of the measures of the interior angles of a triangle is 180°.

C) m∠8+m∠1+m∠2+m∠3+m∠4 = 180° because the sum of the measures of the interior angles of a triangle is 180°.

Interior angles can be created in geometry in two different ways. In one, parallel lines are cut by a transversal, and in the other, they are inside a polygon. Depending on how large they are, angles are divided into various types. Other angles fall into the category of pair angles because they need to be present in pairs in order to display a particular characteristic. One type of these is interior angles.

Interior angles can be outlined in two different ways:

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The equation of the line with points (0.0) and (-3,-7) is y = 7/3 * x

A coordinate system is a method for determining how to position points or other geometrical objects on a manifold, such as Euclidean space, uniquely using one or more integers, or coordinates.

The study of geometry using coordinate points is known as coordinate geometry (also known as analytical geometry). Finding the distance between two points, breaking lines into m:n segments, locating a line's midpoint, computing a triangle's area in the Cartesian plane, and other operations are all feasible using coordinate geometry.

The points are (0,0) and (-3, - 7)

The equation of the line will be

y - 0 = (-7 - 0)/(-3-0) * (x - 0)

⇒y = 7/3 * x

The equation of the line with points (0.0) and (-3,-7) is y = 7/3 * x

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Finding a number's square root is the equivalent as squaring it, or the opposite process. When you multiply the square root of a given integer by itself, you get the original number. Since 8 x 8 equals 64, as fact, 8 is the square root of 64.

It is possible to multiply an integer by its square root in order to obtain the original value. Square root of, end square root is the symbol for this mathematical concept. Contrary to squaring, finding a number's square root is the reverse.

For instance, 3 is squared at 9, 32, and its square root at 9, which is 9, is equal to 3. It is simple to multiply by 9 since it is a perfect square.

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The value of x and y in the equation is (x,y) = (68,2) (optionA)

Simultaneous equations are two or more algebraic equations that share variables e.g. x and y . They are called simultaneous equations because the equations are solved at the same time. For example, below are some simultaneous equations: 2x + 4y = 14 4x − 4y = 4.

x= 60+4y equation 1

7x + 12y = 500 equation 2

rearranging the equation

x- 4y = 60

7x+12y = 500

using elimination method

7x-28y = 420 equation 3

7x+12y = 500 equation 4

subtract equation 4 from 3

-40y = -80

divide both sides by -40

y = -80/-40

y= 2

substitute 3 for y in equation 1

x = 60+4(2)

x= 60+8

x= 68

Therefore the value of x and y is 68 and 2 respectively.

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The equation will be [tex]x-3.2=18.2[/tex] by simple calculation.

An algebraic equation that only requires one step to solve is known as a one-step equation. Once you've figured it out, you'll know what the variable's value is that makes the equation true. In order to obtain the variable by itself when solving one-step equations, we perform the inverse (opposite) of the operation that is being applied to the variable.

An equation that must be solved in two steps is referred to as a two-step equation. Any constant that is on the same side as the variable must be removed first. To solve, isolate the variable on its own using inverse operations. Keep in mind that anything you do to one side must also be done to the other.

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When the input x is -18, the output h is 14. The answer is obtained using substitution method.

What is substitution method?

One of the algebraic techniques for solving simultaneous linear equations is the substitution approach. It entails changing any variable's value from one equation to the other by substituting it in. In this manner, a pair of linear equations are combined into a single, simple linear equation with just one variable.

Now, we are given h = 17+x/6

So, when the input x is -18, using substitution method,

h=17+(-18/6)

=17+(-3)

=17-3

=14

Hence, when the input x is -18, the output h is 14.

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We can define a function f(x) with a domain of all real numbers (−[infinity],[infinity]) and a range of [-11,3].

Let's start by defining our function f(x):

f(x) = [-11,3]

Now, let's define our new function g(x):

g(x) = f(6x) + 1

This means that the range of g(x) is the range of f(x) plus 1, so the range of g(x) is [-67, 19]. In interval notation, this can be expressed as [-67, 19].

We can define a function f(x) with a domain of all real numbers (−[infinity],[infinity]) and a range of [-11,3]. To generate a new function, g(x), we can define it by g(x) = f(6x) +1. This means that the range of g(x) is the range of f(x) plus 1, so the range of g(x) is [-67, 19]. To express this in interval notation, we can write [-67, 19]. This means that the output of g(x) lies between the values -67 and 19. This new range can be found by multiplying each value in the range of f(x) by 6 and then adding 1 to each value. Therefore, the range of g(x) is [-67, 19] in interval notation.

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The Least Common Multiple (LCM) of 4 and 10 is 20, and the Highest Common Factor (HCF) of 4 and 10 is 2.

HCF is the highest integer that can divide 4 and 10 is 2. HCF stands for Highest Common Factor.

Now, 4 and 10 can be expressed as:

4 = 2 × 2 

10 = 2 × 5 

The common prime factor is 2. 

Therefore HCF (4, 10) = 2

The Least Common multiple simply known as LCM is the smallest or the least positive integer that is divisible by the given set of numbers.

Similarly, Calculating the LCM, 4 and 10 can be expressed as;

4 = 2 x 2

10 = 2 x 5

LCM (4, 10) = 2 x 2 x 5 = 20

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The weight of the brick that Sandra dropped is 40 N.

We must know that we can be able to define the density as the ratio of the mass to the volume of the object. We know that the density can be regarded as an intrinsic property of the substance.

We can see that;

Density = mass/volume

mass = Density * volume

Volume = 2 L or 2000 mL

Density = 2 grams per millimeters

Mass = 2 * 2000

Mass = 4000 g or 4 Kg

Weight = mass * acceleration due to gravity

Weight = 4 Kg * 10 m/s^2

Weight = 40 N

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A collection of seven geometric objects known as the Tangram is composed of five triangles (two tiny, one medium, and two large), a square, and a parallelogram.

In the given question, we have to find how many triangles are there in a 7 piece.

As we know that a collection of seven geometric objects known as the Tangram is composed of five triangles (two tiny, one medium, and two large), a square, and a parallelogram.

A dissection problem called a tangram is made up of seven flat polygons, or tans, that are combined to make various shapes. The goal is to use each of the seven parts separately to duplicate a pattern that is typically found in a puzzle book.

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In ΔOPQ, o = 10 cm, p = 67 cm, ∠Q=24,∠P=152.

A triangle in geometry is a three-sided polygon with three edges and three vertices.

The fact that a triangle's internal angles add up to 180 degrees is its most crucial characteristic.

This characteristic is known as the triangle's angle sum property.

If ABC is a triangle, it is written as ABC, where A, B, and C represent the triangle's vertices.

In Euclidean geometry, a triangle is a two-dimensional shape that is represented by three non-collinear points in a single plane.

A closed, two-dimensional shape is a triangle. It is a polygon with three sides. Straight lines make up all of the sides.

The vertex is the intersection of two straight lines. The triangle therefore has three vertices.

Hence, In ΔOPQ, o = 10 cm, p = 67 cm, ∠Q=24,∠P=152.

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Answer:

Step-by-step explanation:

40

Answer:

Below

Step-by-step explanation:

From 10 000 to 99 999   there are 90 000 numbers of which half are even  = 45 000  even 5-digit numbers

Answer: To use the elimination method to solve the system of equations, we'll try to eliminate one of the variables by adding or subtracting the equations.

We have:

4x+y=8

3x-2y=6

multiplying the first equation by -2:

-8x-2y=-16

and adding it to the second equation:

3x-2y+(-8x-2y)=6+(-16)

-5x = -10

x = 2

substituting x=2 in the first equation:

4(2)+y = 8

8+y = 8

y = 0

So the solution is x=2 and y=0, that corresponds to the option B.

The center of a transformation refers to the fixed point through which the transformation takes place.

The center of a transformation can be found by the following methods:

Translation: The center of a translation is the point that remains fixed during the transformation.

Rotation: The center of rotation is the point around which the object rotates.

Reflection: The center of reflection is the line of reflection or the point of symmetry.

Dilation: The center of dilation is the point that remains fixed during the transformation and all the distances from it are multiplied by a scale factor.

Combination of Translations, Rotation, Reflection, and Dilation: The center of transformation will be the point of intersection of all the fixed points of above mentioned four transformations.

It is important to note that not all transformations have a center, and some may have multiple centers.

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To make a model of corresponding angles using toothpicks or straws, you can take two pieces of the material and place them next to each other at the same angle.

When two parallel lines are intersected by another line, corresponding angles are the angles that are created in matching corners or corresponding corners with the transversal.

To make a model of co-interior angles, you can place the two pieces of material on top of each other, with one inside the other at the same angle. To make a model of alternate angles, you can place the two pieces of material on opposite sides of a straight line, with one angle facing up and the other angle facing down.

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Complete question

make a model of corresponding angles using toothpicks or straws