I need help with this.

Answer: D:-1

Step-by-step explanation: 11,9,7,5,3,-1,-3,... => dãy số trên có quy luật là số lẻ

Given the expression:

Let's multiply the expression.

To multiply apply the distributive property of multiplication.

Distribute 4 to the values in the parentheses:

ANSWER:

Answer:

Your leading coefficient is 2

Domain and Range of Functions

Given a function y = f(x), the domain of f is

The range of f is the

We are given the function:

It's required to find the domain and range of the inverse function.

We must recall that, if the inverse function exists, its domain is the range of f, and its range is the domain of f.

Since f(x) is a rational function, it may not exist for the values of x where the denominator is 0.

Concretely, for x=0, the denominator is 0 and the function does not exist, thus the domain of f consists of every real number except x=0.

This can be written as (-∞,0) U (0,∞). This is also the range of the inverse function.

Now let's find the inverse function. We must solve for x the equation:

Adding 3:

Multiplying by x and dividing by y+3:

Swapping letters:

This is the inverse function of f.

Thus the domain of the inverse is:

-3-3

And the range:

Answer: Choice d

In order to find the slope between those two points, we can use the following formula for the slope:

Where m is the slope between the points (x1, y1) and (x2, y2).

So using the points (-4, 2) and (5, 6), we have:

So the slope is 4/9

Step-by-step explanation:

domain = width

range = height

closed point (filled in) means the number is included and we use ()'s.

set builder nation format: (x,y)

domain: (-5, -1)

range: (3,3)

f(1) means what does y equal when x equals 1:

locate on the graph where y is when x = 1:

f(1) = 2

It is observed that f is a subset of A×B

A subset is a subset (another set or the same set). It is expressed as A⊆ B in the set notation to indicate that set A is a subset of set B.Set 1 is a subset of Set 2 if all of its components are included in Set 2. A set, as far as we are aware, is a clearly defined grouping of letters, objects, numbers, or anything else. Set 1 is a subset of Set 2 if Set 1 = A, B, C, and Set 2 = A, B, C, D, E, and F. This is because all the items in Set 1 are also present in Set 2.

Given that :A={1,2,3},B={7,8,9,10}andf={(1,7),(2,9),(3,8)}

A={1,2,3}

B={7,8,9,10}

A×B ={(1,7)(1,8)(1,9)(1,10)(2,7)(2,8)(2,9)(2,10)(3,7)(3,8)(3,9)(3,10)}

f={(1,7),(2,9),(3,8)}

A relation from a non-empty set  A to a non-empty set  B  is a subset of the Cartesian product A×B

It is observed that f is a subset of A×B

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Answer:

9

Step-by-step explanation:

[tex]-5+(-18)+32 \\ \\ =-5-18+32 \\ \\ =-23+32 \\ \\ =9[/tex]

As per the given matrix [tex]A= \left[\begin{array}{ccc}2&2\\-1&1\end{array}\right][/tex], Option (C) is not true.

Matrix:

The matrix is a rectangular array or table of numbers, symbols, or expressions, arranged in rows and columns, which is used to represent a mathematical object or a property of such an object.

Given,

[tex]A= \left[\begin{array}{ccc}2&2\\-1&1\end{array}\right][/tex]

Here we need to find which of the option is not true.

To find the incorrect options first we have to calculate the |A| and A⁻¹.

And we have also check whether is matrix has inverse or skew symmetric matrix.

First, we have to calculate the value of |A|,

|A| = (2 x 1) - (-1 x 2)

|A| = 2 - (-2)

|A| = 2 + 2 = 4

Therefore, option (A) is true.

Now we have to check this matrix has inverse,

It can be calculated using the formula,

[tex]A^{-1} =\frac{1}{|A|} \left[\begin{array}{ccc}d&-b\\-c&a\end{array}\right][/tex]

So, the inverse of the matrix is,

[tex]A^{-1} =\frac{1}{4} \left[\begin{array}{ccc}1&-2\\-(-1)&2\end{array}\right][/tex]

Which is equal to,

[tex]A^{-1} =\left[\begin{array}{ccc}1/4&-2/4\\1/4&2/4\end{array}\right][/tex]

When we simplify it then we get,

[tex]A^{-1} =\left[\begin{array}{ccc}1/4&-1/2\\1/4&1/2\end{array}\right][/tex]

Through this we have conclude that Option (B) and (D) are true.

We know that,

In the skew-symmetric matrix, a matrix whose transpose is equal to its negative.

So, the transpose of the given matrix is,

[tex]A^{T}=\left[\begin{array}{ccc}2&-1\\2&1\end{array}\right][/tex]

So, the given matrix is not a skew-symmetric matrix.

Therefore, the incorrect option is (c).

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If the following table summarizes the percent of U.S. who have diabetes and the accuracy of the current medical tests used to detect the disease.  The percent of those who do not have diabetes test negative for the disease is: B. 56.8%.

Probability can be defined as the tendency or likelihood that something will happen.

Hence,

Percentage of people  do not have diabetes and test positive is 5.2%

Percentage of people  do not have diabetes and test negative is  56.8%

Total percentage of people who tested positive and negative is 62%

Based on the above analysis for people who does not have a diabetes we can see that the Percentage of people  do not have diabetes and test negative is  56.8%.

Therefore the correct option  is B.

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The ratio of appaloosa to mustang horses is 12:40

The total number of horses is given as 52.

Number of white horses =12

Let the number of black horses be x

This means that ratio of white: black horses is 12 : x

Using the ratio above, we can find the number of black horses as follows:

[tex]\frac{x}{12+x} of 52 = x[/tex]

[tex]\frac{52x}{12+x} = x[/tex]

52x = x(12 + x)

[tex](12x + x^{2} ) = 52x[/tex]

[tex]x^{2}[/tex] + 12x - 52x = 0

[tex]x^{2}[/tex] - 40x = 0

Taking out the common factor x from equation we have:

x(x - 40) = 0

This gives us with two solution:

x = 0 and x = 40

Since the question said there are some black horses, the x=0 value can be ignored. So we have x = 40

Hence,  The ratio of appaloosa to mustang horses is 12:40

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Answer:  31y2 + 6

Step-by-step explanation:

61 y2 + 1 y2 = 62 y2  

7y + -7y = 0

6+6 =12

62y2 + 12  then divide by 2 and it's  31y2 + 6

Answer:

I'm not so very sure but I really need points

Units change translation from cm to feets

1 cm is equivalent to 2.5 feets

triangle is a rectangular triangle suported with the bigger side

this means the height of triangle is 6cm

the base is 16 cm

the area is (base x height)/2

so then area= 16x 6/2= 48cm ^2

BUT because 1cm is equivalent to 2.5 feets then

multiply 48 x 2.5 x 2.5 = 48 x 6.25 = 300 ft^2

Solution

(a) There are 9 students entering the school district science project:

medals for 1st, 2nd and 3rd

k1 = 1O ways to choose first person to be chosen from the group of 10.

99

k2 = 8 ways for the second person to be chosen from the remaining people(9–1).

k3 = 7 ways for the second person to be chosen from the remaining people(8–1).

then all you need to do is multiply these k1 * k2 * k3.

(b) There are 7 unique names in a bowl. In how many orders can 2 names be chosen:

This is a permutation problem in order

There are 7 names, and the 2 name have to be in same order

The expression of the square walkway is (x + 4)² - (x - 5)² and the area of the square cement walkway is 135ft².

Area of square:

The area of a square is refers the place covered by the square.

The formula to calculate the area of square is,

Area = s²,

where, 's' refers the side of the square.

Given,

A square swimming pool is covered by a cement walkway with a uniform width.

Length of swimming pool = (x-5) feet.

Length of square walkway including the swimming pool = (x+4) feet

Here we need to find the area  of the cement walkway and when the value of x is 8 then the value of the cement walkway.

1) Here we have to write an expression for the area of the entire square minus area of the pool.

Remember the equation for the area of a square is , where

A = area of square and

s = side value of the square.

We are given that the side of the entire square including walkway and pool is s = (x+4)ft.

Apply the value of the side into the formula for the area of the square, then we get,

A = s²

A = (x + 4)² --------------(1)

We are also given that the side length of the swimming pool is s = (x-5)ft. Apply that into the equation for the area of a square to get the expression for the area of the pool:

A = s²

A = (x - 5)² --------------(2)

Now subtract the area of the pool (x - 5)² from the area of the entire square (x + 4)² to get your expression for the area of the walkway.

Expression for the area of the walkway:

=> (x + 4)² - (x - 5)²

2) Since you know that x = 8ft, you can solve your expression for the area of the walkway. Plug x into your expression:

=> (8 + 4)² - (8 - 5)²

=> (12)² - (3)²

=> 144 - 9

=> 135

The area of your walkway is 135ft².

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We can calculate the slope of a line segment by using the formula:

Where (x1,y1) and (x2,y2) are two points of the line.

In this case the side DF goes from the point D(-2,-2) to the point F(1,7), then its slope is:

For the side, CD, it goes from D(-2,-2) to C(0,4), then its slope is:

4 Tangerines will balance 1 apple.

Given that

Weight of Apple is represented by: a

Weight of tangerine is represented by: t

Weight of Grapefruit is represented by: g

Weight of Banana is represented by: b

Consider 1st picture:

1 apple and 1 tangerine balance 1 grapefruit.

⇒ a+t = g                  ...(1)

Consider 2nd picture:

1 banana and 1 tangerine balance 1 apple.

⇒ b+t = a                  ...(2)

Consider 3rd picture:

2 grapefruits balance 3 bananas.

⇒ 2g = 3b

g = 1.5b                     ...(3)

The system of equations are:

First balance: a+t = g  

Second balance: b+t = a  

Third balance: g = 1.5b  

Putting the value of g from equation (3) to equation (1), we get

a+t = 1.5b                   ...(4)

Now, putting the value of b from equation (2) to equation (4), we get

a+t = 1.5(a-t)

1.5a - 1.5t = a+t

0.5a = 2t

a = 4t

Hence, one apple is balanced by 4 tangerines.

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Polynomials are utilized in management, business, farming, computer science, and math-related fields.Expressions defining known and unknown numbers are created using variables and constants in all professions that need proficiency with polynomials.

where we can use Adding and Subtracting Polynomials in real life?

Electronics

Curve Fitting

Chemistry

Engineering and physics

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The estimated value of 3√28 using linear approximation is 82/27 which is answered in form of fraction.

A general function can be approximated using a linear function in mathematics using the term "linear approximation" (more precisely, an affine function). They are frequently utilised in the finite difference method to create first order approaches for resolving or approximating solutions to equations.

We need to find the approximate value of ∛28 using linear approximation

Let f(a) =  ∛a

then F(27) =  ∛27 = 3

We compute the derivative of f(a) as being

[tex]f(a)=a^{\frac{1}{3}}[/tex]  ⇒  [tex]f'(a)=\frac{1}{3}a^{-\frac{2}{3}}[/tex]

Hence,

[tex]f'(a)=\frac{1}{3}a^{-\frac{2}{3}}[/tex] = [tex]\frac{1}{3}(3)^{-2}=\frac{1}{3}(\frac{1}{9})=\frac{1}{27}[/tex]

Recall the equation of a line is given by

⇒ y - b = m(x - a)

⇒ [tex]y-3=\frac{1}{27}(x-27)[/tex]

⇒ [tex]y=\frac{1}{27}x-1+3[/tex]

⇒ [tex]y=\frac{1}{27}x+2[/tex]

So the approximation at  x= 27.5 would be

⇒  [tex]y=\frac{1}{27}(28)+2[/tex]

⇒ y = 82/27

⇒ y = 3.037

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Answer: Smooth muscle contractions

The g graph exhibits a four-fold vertical stretch.

The graph of f (x)=[tex]x^{2}[/tex] is translated up to two units, then reflected in the X-axis.

The rule for g.

Identify the vertex​

The g graph exhibits a four-fold vertical stretch.

=> g = 4f(x) (x)

an X-axis reflection

=> g = - 4f(x) (x)

(X-axis reflection of (X, Y) is (x , - y)

a conversion two units higher

=> g = -4f(x) + 2

f(x) = x²

=> g = - 4x² + 2

Vertex is at  ( 2, 0)

What is a vertical stretch?

When a base graph is multiplied by a particular factor larger than 1, vertical stretch happens. As a consequence, the graph is stretched outward while keeping the input values (or x). We anticipate that the y values in a function's graph will be further away from the x-axis when it is vertically extended.

How to vertically stretch a function?

When given a function’s graph, we can vertically stretch it by pulling the curve outwards based on the given scale factor. Here are some things to remember when we vertically stretch functions:

Ensure that the values for x remain the same, so the base of the curve will not change.

This means that when applying vertical stretches on a base graph, its x-intercepts will remain the same.

Take note of the new critical points, such as the new maximum point of the graph.

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olution

or this case we have the following vectors:

u= -3i +2j, w= 4j, v= 6i -4j

And we can do the following:

art a

u*v= -3*6 + 2*-4= -18 -8= -26

Part b

w*v= 0*6 + 4*-4 =-16

1) Dividing the given formula by W we get:

2) We know that:

Therefore:

Then:

Substituting W=3/4ft and L=18ft in the given formula we get:

Answer:

1)

2)

Option E, the x-axis is the line of reflection used to map the preimage to its image.

The graph represents that if the graph is folded by an x-axis,

Point Y will cross-point Y', which is two coordinates away from the x-axis.

Point X will cross point X', which is five coordinates away from the x-axis.

Points W will cross-point W', which is eight coordinates away from the x-axis.

Points V will cross-point V', which is five coordinates away from the x-axis.

A mirror image is symmetric about the x or y-axis. Reflection is called "inverse geometry". A mirror reflector is a type of reflector. When the line reflects the image, the reflection line appears. A shape is said to reflect a different shape if a point on a shape is equidistant from a point on another shape.

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Given:

Center of circle: (-4, 7)

Endpoint on the circle: (8, -4)

Let's write the equation of the circle with the given information.

Apply the equation of a circle:

Where:

Center of circle: (h, k) ==> (-4, 7)

Radius = r

Substitute the values of (h, k) in the equation:

To find the radius, let's find the distance between the points (-4, 7) and (8, -4).

Apply the distance formula:

Given:

(x1, y1) ==> (-4, 7)

(x2, y2) ==> (8, -4)

Thus, we have:

Therefore, the radius is 16.3

Therefore, we have the equation of the circle as:

ANSWER:

6 and -6

please give brainliest

Answer: 25 is divisible by 5, so it is composite

Step-by-step explanation:

Answer: x = 7

Explanation - 4(5x-2)=2(9x+3)

20x-8=18x+6

20x-18x=6+8

2x=14

x=14÷2

x=7

Hello there!

Here we need to solve for x.

The first thing that we're going to do is this:

[tex]\implies\boldsymbol{4(5x-2)=2(9x+3)}[/tex]

[tex]\implies\boldsymbol{20x-8=18x+6}[/tex]

[tex]\implies\boldsymbol{20x=18x+14}[/tex]

[tex]\implies\boldsymbol{20x-18x=14}[/tex]

[tex]\implies\boldsymbol{2x=14}[/tex]

[tex]\implies\boldsymbol{x=7}[/tex]

Therefore x=7. I hope this helps you, feel free to comment if you have any queries :)