2. In a sale, a jacket costing $40 is reduced by 20%. What is the sale price?​

Answer:

Plug the following equation in your calculator and this will be your result

7.247 x 10^6

The value of the exponential equation in scientific notation A = 7.247 x 10⁶

When you raise a quotient to a power you raise both the numerator and the denominator to the power. When you raise a number to a zero power you'll always get 1. Negative exponents are the reciprocals of the positive exponents.

The different Laws of exponents are:

mᵃ×mᵇ = mᵃ⁺ᵇ

mᵃ / mᵇ = mᵃ⁻ᵇ

( mᵃ )ᵇ = mᵃᵇ

mᵃ / nᵃ = ( m / n )ᵃ

m⁰ = 1

m⁻ᵃ = ( 1 / mᵃ )

Given data ,

Let the exponential equation be represented as A

Let the first number be p = 7.26 x 10⁶

Let the second number be q = 1.3 x 10⁴

Now , the equation is A = p - q

A in the scientific notation is

Substituting the values in the equation , we get

A = 7.26 x 10⁶ - 1.3 x 10⁴

On simplifying the equation , we get

Taking the common factor as 10⁴ , we get

A = 10⁴ ( 7.26 x 10² - 1.3 )

A = 10⁴ ( 726 - 1.3 )

On further simplification , we get

A = 10⁴ ( 724.7 )

And , the value of A in scientific notation is A = 7.247 x 10⁶

Hence , the exponential equation is A = 7.247 x 10⁶

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The solutions of the quadratic equations are listed below:

In this problem we find quadratic equations of the form a · x² + b · x + c = 0, whose roots can be found analytically by using the quadratic formula:

x = - b / (2 · a) ± [1 / (2 · a)] · √(b² - 4 · a · c), a ≠ 0

Now we proceed to solve each quadratic equation:

1) 2 · x² + 7 · x + 6 = 0

x = - 7 / (2 · 2) ± [1 / (2 · 2)] · √(7² - 4 · 2 · 6)

x₁ = - 1.5, x₂ = - 2

2) 5 · b² - 11 · b - 12 = 0

b = 11 / (2 · 5) ± [1 / (2 · 5)] · √[(- 11)² - 4 · 5 · (- 12)]

b₁ = 3, b₂ = - 0.8

3) m² - 7 · m + 2 = 0

m = 7 / (2 · 1) ± [1 / (2 · 1)] · √[(- 7)² - 4 · 1 · 2]

m₁ ≈ 6.702, m₂ ≈ 0.298

4) 2 · h² - 5 · h - 11 = 0

h = 5 / (2 · 2) ± [1 / (2 · 2)] · √[(- 5)² - 4 · 2 · (- 11)]

h₁ ≈ 3.908, h₂ ≈ - 1.408

5) 3 · x² + 2 · x - 8 = 0

x = - 2 / (2 · 3) ± [1 / (2 · 3)] · √[2² - 4 · 3 · (- 8)]

x₁ ≈ 1.333, x₂ = - 2

6) n² - 15 · n + 8 = 0

n = 15 / (2 · 1) ± [1 / (2 · 1)] · √[(- 15)² - 4 · 1 · 8]

n₁ ≈ 14.446, n₂ ≈ 0.554

7) 4 · a² + 9 · a + 1 = 0

a = - 9 / (2 · 4) ± [1 / (2 · 4)] · √(9² - 4 · 4 · 1)

a₁ ≈ - 0.117, a₂ ≈ - 2.133

8) 5 · k² - 2 · k - 18 = 0

k = 2 / (2 · 5) ± [1 / (2 · 5)] · √[(- 2)² - 4 · 5 · (- 18)]

k₁ ≈ 2.108, k₂ ≈ - 1.708

9) 8 · t² + 6 · t - 35 = 0

t = - 6 / (2 · 8) ± [1 / (2 · 8)] · √[6² - 4 · 8 · (- 35)]

t₁ = 1.75, t₂ = - 2.5

10) 3 · y² - 2 · y + 7 = 0

y = 2 / (2 · 3) ± [1 / (2 · 3)] · √[(- 2)² - 4 · 3 · 7]

y₁ ≈ 0.333 + i 1.491, y₂ ≈ 0.333 - i 1.491

11) 2 · q² + q - 14 = 0

q = - 1 / (2 · 2) ± [1 / (2 · 2)] · √[1² - 4 · 2 · (- 14)]

q₁ ≈ 2.408, q₂ ≈ - 2.908

12) 0.5 · x² - 3 · x - 9.4 = 0

x = 3 / (2 · 0.5) ± [1 / (2 · 0.5)] · √[(- 3)² - 4 · 0.5 · (- 9.4)]

x₁ ≈ 8.273, x₂ = - 2.273

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The recursive formula for the given sequence: 1,5,14,30, . . . is a(n) = a(n-1) + n². It can also be expressed as a(n) = 4a(n-1) -6a(n-2) +4a(n-3) -a(n-4), with a(1) = 1.

A recursive formula of a sequence tells us how to find the nth term, a(n), from the preceding terms, a(n-1), a(n-2), ....

The sequence is:

    1,5,14,30, . . . .

Here:

a(1) = 1, a(2) = 5, a(3) = 14, and a(4) = 30.

Let us write:

a(1) = 1

a(2) = 1 + 4 = a(1) + 2²

a(3) = 5 + 9 = 5 + 3² = a(2) + 3²

a(4) = 14 + 16 = 14 + 4² = = a(3) + 4²

So we can conclude the recursive formula is:

a(n) = a(n-1) + n²

However, we can find another recursive formula.

We have:

a(n) = a(n-1) + n²   ........ (1)

For n -1 this becomes:

a(n-1) =  a(n-2) + (n-1)²

a(n-1) = a(n-2) + n² - 2n + 1 ........ (2)

Subtract (1) - (2):

a(n) - a(n-1) = a(n-1) + n²  - a(n-2) - n² + 2n - 1

a(n) - a(n-1) = a(n-1) -a(n-2) + 2n - 1

⇒ a(n) = 2a(n-1) -a(n-2) + 2n - 1  ...(3)

Equation (3) applies for any n, therefore for n -1, eq.(30 becomes:

a(n-1) = 2a(n-2) -a(n-3) + 2(n-1) - 1   ....(4)

Subtract Eq.(3) - Eq.(4).

a(n) - a(n-1) =  2a(n-1) -a(n-2) + 2n - 1 - (2a(n-2) -a(n-3) + 2n - 3)

a(n) - a(n-1) = 2a(n-1) - 3a(n-2) + a(n-3) + 2

⇒ a(n) = 3a(n-1) - 3a(n-2) + a(n-3) + 2   ....(5)

Substitute for n-1 again into Eq.(5):

a(n-1) = 3a(n-2) - 3a(n-3) + a(n-4) + 2 .....  (6)

Subtract Eq.(6) - Eq.(5)

a(n) - a(n-1) =  3a(n-1) -3a(n-2) +a(n-3) +2 -3a(n-2) +3a(n-3) -a(n-4) -2

a(n) - a(n-1) =  3a(n-1) -6a(n-2) +4a(n-3) -a(n-4)

⇒ a(n) = 4a(n-1) -6a(n-2) +4a(n-3) -a(n-4)

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The angle ∠JKN  is 79°

A figure which is formed by two rays or lines that shares a common endpoint is called an angle. A bisector divides an angle into two equal angles.

∠JKN = (8x - 13)°                     (given)

∠NKL = (6x +11)°                      (given)

∠JKN = ∠NKL                         ( As KN bisects ∠JKL )

8x - 3 = 6x + 11                        ( substituting equations from question )

8x - 6x = 11 + 3                        ( bringing like terms on same side)

2x = 23                                    

x = 23/2

x = 11.5

Now, put value of x in the given equation: ∠JKN = (8x - 13). we get

∠JKN = (8x - 13)

∠JKN = (8*11.5 - 13)

∠JKN  = (92 - 13)

∠JKN  = 79°

Therefore, We can conclude that the angle ∠JKN  is 79°.

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According to the given statement

The sum of a number x and 7, divided by 15 , is at most is -52

Ax+b = 0, where a and b are two integers, and x is a variable, is an example of a linear equation with one variable. This equation has just one solution. In the linear equation 2x+3=8, for instance, there is just one variable.

The fundamental equation used to express and solve for an unknown quantity is a linear equation in one variable. It is always a straight line, and it is simply shown visually. A mathematical statement is simply represented by a linear equation. Unknown quantities can be represented by any variable or symbol, but often, the unknown quantity in a linear equation with one variable is represented by the variable "x." There are a few straightforward procedures for solving linear equations. 

According to the given value;

= (x+7)/3=15

⇒x+7=-45

=>x=-45-7

   x= -52

Therefore your answer is = -52

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Based on the loan amount of $15,000 and the fair credit score, the amount of interest to be paid on the loan at the end of the first month is $80.

The interest on a credit score that is fair is 6.40%.

That means the annual interest on the loan is:

= 15,000 x 6.40%

= $960

The interest in the first month is:

= Annual interest / number of months in year

= 960 / 12 months

= $80

In conclusion, the interest in the first month is $80.

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D = M/12 + N/4 represents the relationship between Elena's distance in miles, D, and her biking speed.

Speed = distance/ time

Here, we are given that Elena bikes 20 minutes each day for exercise. She bikes at a constant speed of M miles per hour for the first 5 minutes, then at N miles per hour for the last 15 minutes.

Therefore, distance covered by her in the first 5 minutes = speed x time

time = 5 minutes = 5/60 hours

= 1/12 hours

Thus, distance = M(1/12)

= M/12

Now, similarly, distance covered by her in the last 15 minutes = N(15/60)

=N/4

Thus, the total distance in miles, D, covered by her in the last 15 minutes = N(15/60)

= N/4

Thus, the total distance in miles, D, covered by her is D = M/12 + N/4

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According to the given statement,

The distance between the two points of Traingle A and B is 7.85 m

The area created between two of a triangle's side lengths is known as the angle. Both internal and external angles are present in a triangle. In a triangle, there are three interior angles. When the sides of a triangle are stretched to infinity, exterior angles are created.

Between a triangle's shorter side and its extended side, external angles are created. There is an inside angle next to each outer angle. Angles that share a vertex and side are said to be adjacent.

According to the given value;

Angle B = 60° , Angle A = 50°

In ∆ BCD

tan60° = 30/BC

√3 = 30/BC

BC = 30/√3

BC = 10√3

In ∆ ACD

tan50° = 30/AC

tan50° = 30/(BC+AB)

BC + AB = 30/tan50°

10/√3 + AB = 30/tan50°

AB = 30/tan50° - 10√3

AB = 25.173 - 10√3

AB = 7.85 m

Hence, distance between the two points A and B is 7.85 m.

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Answer:

this is the solution for your question

7th term of the series = 27.5

Here the series is in arithmetic sequence

Now we have to find the common difference between the series,

common difference (d) = 15- 12.5 = 17.5 - 15 = 2.5

To find the nth term of an arithmetic series we have a formula,

[tex]t_{n}[/tex] = a + (n-1) d

So by this we can find the 7th term of the series

[tex]t_{7}[/tex] = 12.5 + (7-1) 2.5

  = 12.5 + 6 × 2.5

  = 12.5 + 15

 = 27.5

So the 7th term of the series is 27.5

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The area of the parallelogram = 7 × 6 = 42 units².

The area of a parallelogram = base × height.

Given the following:

The length base of the given parallelogram = 7 units

The height of the parallelogram, is the rise of the side = 6 units.

Using the area formula for a parallelogram, we have:

The area of the parallelogram = 7 × 6

The area of the parallelogram = 42 units²

Therefore, the area of the parallelogram = 7 × 6 = 42 units².

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Answer:

====================

Supplementary angles sum to 180°.

The simplified form of expression is  (2y + 3).

Rewriting the provided mathematical expression first -

5/(y + 3) + 15/(y - 3)

Shifting the second expression on other side of equation -

5/(y + 3) = - 15/(y - 3)

Performing cross multiplication

5 (y - 3) = -15 (y + 3)

5y - 15 = -15y - 45

Rearranging the equation

5y - (-15y) = -45 - (-15)

Performing addition and subtraction

5y + 15y = -45 + 15

20y = -30

Dividing both sides of equation by 10

2y = - 3

Rearranging the equation -

2y + 3

Hence, the simplified form of expression is (2y + 3).

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The slope of the line containing (8,-3) and (-6,-2) is (1/14).

The slope of a straight line can be written as follows,

m =  [tex](y_{2} - y_{1} )/(x_{2} - x_{1} )[/tex]                 equation1

The line is containing the points (-3,3) and (4,3). So, we can write

[tex]y_{2}[/tex] = -2 , [tex]y_{1}[/tex] = -3 , [tex]x_{2}[/tex] = -6 , and [tex]x_{1}[/tex] = 8 .

On substituting the values of variables in equation1, we will get

m = ( (-2)-(-3) ) / ( (-6)-(8) ) = (1/14).

As the slope of a line is (1/14), so we can conclude that the given line is a straight line.

Here:

m = the slope of the line

( [tex]x_{1}[/tex] , [tex]y_{1}[/tex] ) are the first coordinates.

( [tex]x_{2}[/tex] , [tex]y_{2}[/tex] )are the second coordinates.

The slope of the line containing (8,-3) and (-6,-2) is (1/14).

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The position and label of the given right angle triangle ΔX Y Z whose hypotenuse will be 3.16 b have been plotted.

A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices.

In a triangle, the sum of all three angles is 180°

Triangle is a very common figure to deal with our daily life for example in our daily life to measure the height of any tower then there is a huge application of the right angle triangle.

Given the right-angle triangle ΔX Y Z

XY = b(base) and XZ = 3b(perpendicular).

By Pythagoras theorem,

Hyp² = Base² + Perp²

Hyp² = b² + (3b)²

Hyp² = 10b²

Hyp = 3.16b

Hence "The position and label of the given right angle triangle ΔX Y Z whose hypotenuse will be 3.16 b have been plotted".

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The solution to this equation is equal to 6.

Equations are expressions which are formed by constants, operators and variables. In this question we find a linear equation in implicit form, in which the variable t has to be solved:

- 9 · (t - 2) = 4 · (t - 15)                         Given

- 9 · t + 18 = 4 · t - 60                          Distributive property / (- a) · b = - a · b / (- a) · (- b) = a · b

78 = 13 · t                                             Compatibility with addition / Existence of additive inverse / Modulative and distributive properties

13 · t = 78                                              Symmetric property

t = 6                                                      Compatibility with multiplication / Existence of multiplicative inverse / Associative and modulative properties / Result

The solution to this equation is equal to 6.

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Answer:

[tex]t = 6[/tex]

Step-by-step explanation:

[tex] - 9(t - 2) = 4(t - 15)[/tex]

[tex] - 9t + 18 = 4t - 60[/tex]

[tex] - 9t - 4t = - 60 - 18[/tex]

[tex] \frac{ - 13t}{13} = \frac{ - 78}{ - 13} [/tex]

Cross out -13t/13

[tex]t = 6 \: final \: answer[/tex]

Answer:

29

Step-by-step explanation:

ur in high school bro. Im in 7th grade. Get good bc is gonna get harder

 From the list of numbers presented ( 1,0.5,0.25,0.125,0.0625)  we can determine that this is a finite sequence.

      A sequence is an order of elements that are governed by a pattern, that is, it has variations between each element that remain constant and allow us to determine values before or after the known elements.

 A sequence maintains an order, and this numerical order can be finite or infinite, in the given case we have the following list:

1, 0.5, 0.25, 0.125, 0.0625

1/2ⁿ

  We can clearly notice that we have a limit number and it is 0.0625, as we know the beginning of the sequence and the exact end we can know that we are in the presence of a finite sequence.

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Answer:

40%

Step-by-step explanation:

To start off, we are going to place the number of movies he thought were very good, over the movies he watched over the entire year into a fraction (or a certain number over the total amount)!

18/45 or [tex]\frac{18}{45}[/tex]

Next, we are going to place this into our calculator and will get a decimal value.

18/45 → 0.40

Last, we are going to change this number into a percentage, by multiplying our decimal by 100.

0.40 → 40%

Hope this Helps! :)

Have any questions? Ask below in the comments and I will try my best to answer.

-SGO

[tex]\displaystyle\\Answer:\ y=\frac{x}{3}-3[/tex]

Step-by-step explanation:

      [tex](0,-3)\ \ \ \ \ (6,-1)[/tex]

     [tex]\displaystyle\\ Equation\ of\ the\ line\\\\\boxed {\frac{x-x_1}{x_2-x_1} =\frac{y-y_1}{y_2-y_1} }[/tex]

 [tex]\displaystyle\\x_1=0\ \ \ \ x_2=6\ \ \ \ \ y_1=-3\ \ \ \ \ y_2=-1\\\\\frac{x-0}{6-0}=\frac{y-(-3)}{-1-(-3)}\\\\\frac{x}{6}=\frac{y+3}{-1+3} \\\\\frac{x}{6} =\frac{y+3}{2} \\\\Multiply\ both\ parts\ of \ the\ equation \ by \ 2:\\\\\frac{x}{3}=y+3\\\\\frac{x}{3}-3=y+3-3\\\\ \frac{x}{3} -3=y \\\\Thus,\\\\y=\frac{x}{3}-3[/tex]              

It should be noted that the expression for 72 + 40 will be 8(9 + 5).

The factors of 72 are:

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72.

The factors of 40 include:

1, 2, 4, 5, 8, 10, 20 and 40

Therefore, it can be seen that the greatest common factor between the numbers is 8.

The expression for 72 + 40 will be 8(9 + 5).

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Hence, the number of people are in the Smith family is [tex]23[/tex].

What is the division?

Division is one of the four basic operations of arithmetic, the ways that numbers are combined to make new numbers.

Here given that,

A hotel charges $[tex]80[/tex] for a basic room for one person per night. It charges $[tex]15[/tex] for each additional person per night. The Smith family takes three rooms for three nights. The bill comes to $[tex]1035[/tex].

So,

Rent for the one day is

[tex]\frac{1035}{3}=345[/tex]

Number of people are in the Smith family is

[tex]\frac{345}{15}=23[/tex]

Hence, the number of people are in the Smith family is [tex]23[/tex].

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A compound function is when the output of one function is used as the input of another function. If we have a function ff and another function gg, the function fg(x)fg(x) is called "ff of gg of xx" or "fgfg of xx" and is a composition of the two functions.

The order in which functions are applied is important. Find the function of the function. If you have two or more functions, there can be many different permutations of those functions, giving you many different composite functions.

fg(x)fg (x) can be written f[g(x)] f[g(x)] to indicate that the inner function should be applied before the outer function.

Solution:

Your problem → f(x)=x/2, g(x)=-2x+4, Find f(g(x))

f(x)=x2, g(x)=-2x+4, fog(x)=?

g(x)=-2x+4, f(x)=x2

fog(x)=f(g(x))

=f(-2x+4)

=-2x+42

=-x+2

fog(x)=-x+2

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The perimeter of the smaller of the two similar trapezoids is 14 yards.

Similar polygons are polygons that have equal corresponding angles and proportional corresponding sides.

The ratio of one side of a polygon to the corresponding side of the other is called the scale factor.

The ratio of the perimeters is the same as the scale ratio, while the ratio of the areas is the square of its scale ratio.

If two similar trapezoids have a scale factor of 3 : 2, then the ratio of their perimeters is also 3 : 2.

If the perimeter of the larger trapezoid is 21 yards, solve for the perimeter of the smaller trapezoid using the ratio for the perimeter.

3 : 2 = 21 yards : perimeter of the smaller trapezoid

perimeter of the smaller trapezoid = 2(21 yards)/3

perimeter of the smaller trapezoid = 14 yards

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Yes, there is a relationship between the screen size and the number of pixels.

The equation representing the relationship will be a = 5,184p.

It should be noted that the information is to simply know if there is a relationship between the screen size and the number of pixels.

The equation representing the relationship will be:

= Number of pixels / Screen size

= 31.104 / 6

= 5.184

Therefore, the equation representing the relationship will be a = 5,184p.

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Answer: MP is 29 units

Step-by-step explanation:

MP=MN+NP

5y+9=17+3y

5y+9-3y=17+3y-3y

2y+9=17

2y+9-9=17-9

2y=8

Divide both parts of the equation by 2:

y=4

Thus:

5*4+9=

20+9=

29 units

Answer:

3 and 4

Step-by-step explanation:

Since complementary angles add up to 90,

and 1 is a right angle while 3 and 4 are vertical angles