Select the correct answer from the drop-down menu. Katie is watching a helicopter flying at an altitude of 5 miles. If the angle of elevation is , the distance between katie and the helicopter is approximately miles.

In its simplest form in algebra, the definition of an equation is a mathematical statement that shows that two mathematical expressions are equal.

A General Rule for Solving Equations

x= 9, y= 15

-4x +3y= 8 -----(1)

2x +5y=-3-----(2)

(1) ×2:

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

(3) -(2):

-4x +6y -(-8x +6y)= 16 -1

-4x +6y +4x -5y= 15

y= 15

Substitute y= 15 into (1):

-4x +3(15)= 8

-4x+45=8

4x+45-8

4x=37

x=37÷4

x=9

b = 2(9) + 5(15)  + 3

b = 13 + 75 + 3 = 91

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Answer:

  1598.9 ft

Step-by-step explanation:

You want the distance between points A and B when observers at each point find the angle of elevation to a lighthouse beacon to be 15° and 6°, respectively. Point A is 1032 ft horizontal distance from the lighthouse.

The tangent relation for sides in a right triangle is ...

  Tan = Opposite/Adjacent

This can be rearranged to ...

  Opposite = Tan × Adjacent

If d is the distance in feet from A to B, two expressions for the same lighthouse height can be written:

  height = tan(15°)(1032)

  height = tan(6°)(1032 +d)

Equating these values of height, we have ...

  tan(6°)(1032 +d) = tan(15°)(1032)

  d = 1032(tan(15°) -tan(6°))/tan(6°) = 1032(tan(15°)/tan(6°) -1)

  d ≈ 1598.946 . . . . feet

The distance from A to B is about 1598.9 feet.

x=-2+3√2/2 and x=-2-3√2/2 are solutions of the quadratic equation 2x²+4x=7.

A quadratic equation is a second-order polynomial equation in a single variable x , ax²+bx+c=0. with a ≠ 0 .

The given quadratic equation is 2x²+4x=7

Subtract 7 from both sides of the equation.

2x²+4x-7=0

Use the quadratic formula to find the solutions.

x=-b±√b²-4ac/2a

x=-4±√16-4(2)(-7)/2(2)

x=-4±√16+56/4

x=-4±√16+56/4

x=-2±3√2/2

x=-2+3√2/2 and x=-2-3√2/2

Hence, x=-2+3√2/2 and x=-2-3√2/2 are solutions of the quadratic equation 2x²+4x=7.

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Answer:

9

Step-by-step explanation:

vertical angles are congruent

110=13x-7

110+7=13x

117=13x

divide

9=x

x=9

With the help of Algebra the correct function is C(t) = 0.10t+25.

What is Algebra?

Algebra is a branch of mathematics that deals with the study of symbols and the rules for manipulating them. It is used to solve a variety of equations and problems by using formulae, equations and graphs. Algebra is primarily used to find unknown values, such as the unknown side of a triangle or the value of a variable in an equation. It can also be used to solve problems that involve more than one variable, such as those involving linear equations and systems of equations. Algebra is a powerful tool for problem-solving and can be used in various scientific fields, such as physics, chemistry and engineering. It is essential for developing a good understanding of mathematics and is an important part of any mathematics curriculum.

Assuming that :  y = kx + b

plug in : ( 0, 25 ) and  ( 50, 30)

25 = b

30 = 50k + 25

so, k = 0.10 after solving this equation

y =  0.10t+25

Hence the function is C(t)=  0.10t+25

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Answer:

1. statistic 2. parameter

Step-by-step explanation:

Answer:

The answer is a = w + 4 - 3b/2

Step-by-step explanation:

w = 3(2a + b) - 4

add 4 both sides we get,

w + 4 = 3(2a + b) - 4 + 4

w + 4 = 3(2a + b)

w + 4 = 6a + 3b

Subtract 3b from both sides we get,

w + 4 - 3b = 6a + 3b - 3b

w + 4 - 3b = 2a

Now, Divide both sides by 2 we get,

w + 4 - 3b/2 = 2a/2

a = w + 4 - 3b/2

Thus, The answer is a = w + 4 - 3b/2

The slope of a line is the change in the line's y coordinate from its x coordinate.

The shift from the line's y coordinate to its x coordinate is referred to as the slope of a line. The following mathematical formula is used to express the slope of a line:

Slope: y₂-y₁/x₂-x₁

For instance using the coordinate points(0, 0) and (1, 3), respectively, into the formula to obtain:

Slope = 3-0/1-0

Streamline to have:

Slope = 1/3

Slope = 3

As a result, the slope of the line passing the coordinates is 3.

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It is demonstrated in the following figure itself that △LMN is a right triangle.

A right triangle, also known as a right-angled triangle, right-perpendicular triangle, orthogonal triangle, or formerly rectangle triangle, is a triangle with one right angle, or two perpendicular sides.

The foundation of trigonometry is the relationship between the sides and various angles of the right triangle.

A right triangle's hypotenuse is its longest side, its "opposite" side is the one that faces a certain angle, and its "adjacent" side is the one that faces the angle in question.

To describe the sides of right triangles, we utilize specific terminology.

The side opposite the right angle is always the hypotenuse of a right triangle.

So, in the given figure, it is shown that △LMN is a right triangle.

Therefore, it is demonstrated in the following figure itself that △LMN is a right triangle.

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Yes, Purple math is a completely free online math resource for students and teachers.

What is purple math?

Purple math is an online resource that provides comprehensive math lessons and problem-solving tools for students of all ages.

It offers step-by-step instructions for solving math problems, interactive tutorials, and helpful study guides.

The website also features practice tests, quizzes, and a variety of other learning resources to help students improve their math skills.

Purple math makes learning math fun and accessible to everyone, no matter their age or learning level.

According to the given question:

It provides comprehensive math lessons and tutorials, as well as interactive practice questions with instant feedback. It is an invaluable tool for students of all levels as it is free, from middle school to college, who are looking to improve their math skills and better understand mathematical concepts.

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The time required for the balance of the account to be $6000 is 19.5 years.

The simple interest method, which adds interest to the starting principal amount at the same rate every day, is a quick and easy technique to calculate the interest on that money.

Simple interest is a way to calculate the amount of interest that will be charged on a certain amount of money at a certain rate and for a certain period of time.

As per the information in the question,

Principal amount, p = $3500

Rate, r = 8.75%

End amount = $6000

SI = (p × r × t)/t

6000 = 3500 × 8.75% × t

t = (6000 × 100)/(3500 × 8.75)

t = (600000)/(3500 × 8.75)

t = 19.5 years.

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Answer:

the answer it's No, it is not proportional because 2.3 over 9.2 does not equal 13.6 over 3.4.

Answer: The answer is C!

Step-by-step explanation:

On the basis of their sides, we may similarly determine the areas of various shapes like rectangles, parallelograms, triangles, and any polygon.

The space that the object occupies is called the area. It is the area that any shape resides in. We only take into account a square's side length when calculating its area. Since a square's area is equal to the square of each of its equal sides, it is a square.

On the basis of their sides, we may similarly determine the areas of various shapes like rectangles, parallelograms, triangles, and any polygon. Based on the radius or the separation of the surface's outer line from the axis for curved surface objects, the area of the surface is determined.

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From the concepts and properties of triangles, m∠BDC is 26°.

A triangle is a three-sided closed-plane figure formed by joining three noncolinear points. Based on the side property triangles are of three types they are Equilateral triangle, Scalene triangle, and Isosceles triangle.

We know the sum of all the interior angles in a triangle is equal to 180°.

In the given ΔABD, line segment AD and BD are equal and hence it is an isosceles triangle.

Therefore,

x° + x° + 70° = 180°.

2x° = 110°.

x = 55°.

So, m∠DAB = m∠DBA = 55°.

We know the sum of linear pair of angles is 180°.

Therefore, m∠ABD + m∠DBC = 180°.

55° + m∠DBC = 180°.

m∠DBC = 125°.

Now,

m∠BDC + m∠DCB + m∠CBD = 180.

m∠BDC + 29° + 125° = 180°.

m∠BDC = 26°.

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The mean of the set of numbers 23, 45, 87, 40, and 50 is 49. This is the average value of the set, and it is affected by all the values in the set.

The mean, also known as the arithmetic mean, of a set of numbers is found by adding up all the numbers in the set and dividing by the total number of numbers in the set. In this case, the set of numbers is 23, 45, 87, 40, 50. When we add up all the numbers in the set, we get a total of 245. There are 5 numbers in the set, so the mean is 245 / 5 = 49.

To find the mean, we first need to add up all the numbers in the set. Then, we divide that sum by the total number of numbers in the set. This gives us the average value of the set.

In summary, the mean of the set of numbers 23, 45, 87, 40, 50 is 49. This is the average value of the set, and it is affected by all the values in the set.

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The space among contour lines are known as Sharp slopes which is closely spaced contour lines. Gently sloping or comparatively flat regions are shown by widely spaced contour lines.

Contour lines link places with the same elevation; if they are close together (they never intersect), the terrain is steep and the elevation changes quickly over a short distance. The elevation changes gently where the contour lines are far apart, indicating a moderate slope.

The areas between the contour lines are filled with colors when using the layer tinting technique. A particular height is indicated by each color. Contours are shown as lines. A hilltop is indicated by a contour line that creates a closed loop with no other contour lines inside. Sharp slopes are indicated by closely spaced contour lines. Gently sloping or comparatively flat regions are shown by widely spaced contour lines.

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The size and shape of things are preserved by stiff transformations (reflections, translations, and rotations). As a result, archetypes and visuals are always compatible.

The separation between each pair of the geometric object's points is preserved during a rigorous change of the object. In other words, a rigid transformation maintains the object's size and shape. For instance, the rigid transformation of a triangle retains the angles and lengths of the triangle. Imagine a stiff shape distortion, similar to a cardboard shape. The form remains the same after being pushed left and right, rotated, and flipped. When the mold was created using putty, the opposite was true. The thing can then be twisted and stretched. These conversions, nevertheless, are not exact. Stretching a form alters the distances between each pair of its points.

c + 18 + 10 = 42//

[tex]c = 42 -(18 + 10) cm = 14 cm\\s = 21 cm//[/tex]

Area = [tex]\sqrt{s(s - a)(s - b)(s - c) }[/tex]

and, here s = half the perimeter,

[tex](a + b + c)/2.[/tex]

A = [tex]21\sqrt{11}[/tex]

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To display the distribution of the lengths in inches of a sample of brook trout, the graph you should use is histogram. (Option A)

A histogram refers to a graphical representation of data points organized into user-specified ranges. It is an approximate representation of the distribution of numerical data. It is similar in appearance to a bar graph; however, the histogram condenses a data series into an easily interpreted visual by taking many data points and grouping them into logical ranges or bins. It is used to summarize discrete or continuous data that are measured on an interval scale. The histogram is represented by a set of rectangles, adjacent to each other, where each bar represents a type of data. Hence, in order to display the distribution of the lengths in inches of a sample of brook trout, the appropriate graph to use is histogram.

Note: The question is incomplete. The complete question is probably is: To display the distribution of the lengths in inches of a sample of brook trout, what graph should you use? A) histogram B) bar chart C) scatterplot D) pie chart E) line graph.

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3x - 1 = 0 is not a quadratic equation.

A variable with the largest power of two in a quadratic equation is called a variable. Quad, which signifies square, is the root of the term quadratic. The phrase must be two times its own strength, neither higher nor lower.

Given that they are the x values for which f(x) = 0, the roots of the function f(x) = ax² + bx + c correspond to the solutions of the quadratic equation ax² + bx + c = 0.

The term ax² is known as the quadratic term (hence the function's name), the word bx is known as the linear term, and the value c is known as the constant term.

In the given equation: 3x - 1 = 0 , no ax² term is given, so it is not a quadratic equation.

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The complete question is as follows:

Is 3x - 1 = 0 a quadratic equation?

The inequality x² + 8x - 238 <= 0 represents the situation in which the area of the cake is at least 254 square inches.

The width of the cake is 4 inches more than the width of the photo, so the width of the cake can be represented by the expression x+4.

The length of the cake is two times its width, so the length of the cake can be represented by the expression 2(x+4).

The area of the cake is the product of its length and width, so it can be represented by the expression (x+4)(2(x+4)).

To represent the situation in which the area of the cake is at least 254 square inches, we can set the expression for the area equal to 254 and solve for x:

(x+4)(2(x+4)) >= 254

2x² + 16x + 16 >= 254

x² + 8x - 238 <= 0

The inequality x² + 8x - 238 <= 0 represents the situation in which the area of the cake is at least 254 square inches.

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The sample size is more than 30 and according to the central limit theorem, with a sample size of more than 30, approximately normal distribution.

What is the central limit theorem?

The central limit theorem establishes that, in many situations, when independent random variables are summed up, their properly normalized sum tends toward a normal distribution even if the original variables themselves are not normally distributed.

We have,

the shape of the sampling distribution of the (mean of members - mean of non-members):

A. It's exactly normal because both populations are normally distributed.

B. It's approximately normal because both sample sizes are at least 30.

C. It's skewed, because the populations are skewed, and both sample sizes are at least 30.

D. The shape cannot be determined since we don't know the shape of either population distribution.

Option (B) is true, as the sample size is more than 30 and according to the central limit theorem, with a sample size of more than 30, approximately normal distribution.

Hence, the sample size is more than 30 and according to the central limit theorem, with a sample size of more than 30, approximately normal distribution.

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Answer: 25 smaller than or equal to  t

Step-by-step explanation:

Because we know that she only has enough money to make 25 t-shirts or less, our number 25 will be smaller than or equal to t.

Therefore, the  Uppercase delta (Δ) in calculus denotes the change of variable.

Calculus is a discipline of mathematics that, in its most basic form, deals with rate of change. As an illustration, suppose you wanted to figure out how fast an automobile would slow down as it approached a stop sign. You may determine that change using calculus. Yes, calculus incorporates movement into math.

Here,

Given: Uppercase delta (Δ)

In math, the uppercase letter delta () typically denotes "change" or "the change."

Consider a scenario where the variable x represents an object's motion.

Consequently, "Δx" denotes "the change in movement." This mathematical interpretation of delta is used by scientists in a variety of scientific fields.

Therefore, the  Uppercase delta (Δ) in calculus denotes the change of variable.

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Sets of points connected by typical lines or curves form graphs.

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The height of the isosceles triangle is  h = [tex]\sqrt{a^{2}-\frac{c^{2} }{4} }[/tex]

Given,

Isosceles triangle;

An isosceles triangle has two equal sides as well as two equal angles. The Greek words iso (same) and skelos are the source of the name (leg). An equilateral triangle is one in which all of its sides are equal, whereas a scalene triangle is one in which none of its sides are equal.

Follow these procedures to determine an isosceles triangle's height:

That is,

Height, h = [tex]\sqrt{a^{2}-\frac{c^{2} }{4} }[/tex]

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The factor of  [tex]x^3 -7x + 6[/tex] is (x - 1) (x +3) (x -2).

Now, According to the question:

The given expression to be factorized is :

[tex]x^3 -7x + 6[/tex]

This can be written in the form:

[tex]x^3 -7x + 6[/tex] = [tex]x^3[/tex] - (1 + 6)x + 6

[tex]x^3 -7x + 6[/tex] = [tex]x^3[/tex] -x - 6x + 6

Take common 'x' from the first two terms and -6 from the last two terms. Then we have,

[tex]x^3 -7x + 6[/tex] = x([tex]x^2 -1[/tex]) -6 (x -1)

                  = x{ [tex](x)^2 - (1)^2[/tex] } - 6(x -1)

                  = x(x +1) (x -1) - 6(x -1)

Finally, Take common (x -1) from the above expression:

[tex]x^3 -7x + 6[/tex] = (x -1) {x(x +1) - 6}

                 = (x -1) [tex](x^{2} +x-6)[/tex]

                 = (x -1)([tex]x^{2}[/tex]+3x -2x -6)

                 = (x - 1) (x (x +3) -2 (x +3))

                 = (x - 1) (x +3) (x -2)

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The complete question is this:

Which is the factor of [tex]x^3 -7x + 6[/tex]

1. x(x -6) (x -1)

2. [tex](x^{2} -6)[/tex] (x -1)

3. (x + 1) (x + 2) (x +3)

4. (x - 1) (x +3) (x -2)

Hence,the company should produce 12 pieces of Model A and 6 pieces of Model B to get the maximum profit i.e. 168000.

Let x be the number of pieces of model A and y be the number of pieces of model B.

Let total profit be Z

Then, Total profit =8000x+12000y

                         Z=8000x+12000y .............. (i)

Now we have the following mathematical model for the given problem 

Max Z=8000x+12000y

Subject to constraints 

9x+12y≤180 .......... (Fabricating constraints)

3x+4y≤60   .......... (ii)

x+3y≤30   (Finishing constraints)........ (iii)

Let us evaluate the objective function Z at each point as shown below

At C(0,10),  Z=8000×0+12000×10=120000

Maximum value of Z is 168000 at B(12,6)

Hence, the company should produce 12 pieces of Model A and 6 pieces of Model B to get the maximum profit i.e. 168000.

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Answer:

Miyo can make 30 origami figures in 18 minutes

Step-by-step explanation:

tbh, i just counted up by 5's until i reached 18

Answer: 3

Step-by-step explanation: Because we know Miyo can make 5 origami figures in 3 minutes. and we want to know How many origami figures can Miyo make in 18 minutes? so, we know 5*3 is 15. right? well, then we take 18-15 and get 3 so, Miyo can make 3 origami figures in 18 mins.

Step-by-step explanation:

remember some of the angle theorems inside a circle.

first of all, arc angles are the angles of the corresponding circle segments at the center of the circle (the angle between the lines from the points on the arc to the center).

and, of course, all the arc angles together around a circle are therefore 360°.

so,

(8x + 20) + 104 + arc angle KJP = 360

and then :

the opposite angle is half of the arc angle for the same points on the circle arc.

angle L = 5x + 1 is the opposite angle of K and P, and that is therefore half of the arc angle KJP.

5x + 1 = (arc angle KJP)/2

arc angle KJP = 2×(5x + 1)

and by using this in the first equation we get

(8x + 20) + 104 + 2×(5x + 1) = 360

8x + 124 + 10x + 2 = 360

18x + 126 = 360

18x = 234

x = 234/18 = 13