Which of the following is the reciprocal of x2 – 2x – 8?
Which of the following is the reciprocal of x2 – - 1

Answers

Answer 1
Answer: Hi again

x² - 2x - 8
Factor
= (x + 2)(x -4)
Answer : A is the correct option.


If you wanna check if A is the right answer, I will solve it for you and it will you give you the exact answer which will be x² - 2x - 8
(x+2)(x-4)
Distribute
(x)(x) + (x)(-4)+(2)(x)+(2)(-4)
= x² - 4x + 2x - 8
= x² - 2x - 8
Here it is, we find the exam answer.

Thus, (x+2)(x-4) is the reciprocal of x² -2x - 8


I hope that's help !

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Is (6,3) a solution to this system of equations y=3x - 3 3x - y =3

Answers

Answer:

It is not a solution

Step-by-step explanation:

Plug the point into the equations and check to see if they are true

y=3x - 3

3 = 3(6) -3

3 = 18-3

3 = 15

False

We do not need to check the other equation since this is false

.........help please?

Answers

106.
174 is the lines measurement and the other part that is numbered is 68 so, you subtract 174 and 68 and you get 106.

Question is: Solve -7(x+6)=4(x+6)

Answers

\huge\boxed{x=-6}

Hey there! Our goal here is to isolate the variable on one side of the equation.

\begin{aligned}-7(x+6)&=4(x+6)&&\smash{\Big|}&&\textsf{Start with the original equation.}\n-7x+(-7)(6)&=4x+4(6)&&\smash{\Big|}&&\textsf{Distribute.}\n-7x-42&=4x+24&&\smash{\Big|}&&\textsf{Multiply.}\n-7x-4x&=24+42&&\smash{\Big|}&&\textsf{Move the terms.}\n-11x&=66&&\smash{\Big|}&&\textsf{Combine like terms.}\nx&=\boxed{-6}&&\smash{\Big|}&&\textsf{Divide both sides by $-11$.}\end{aligned}

Answer: The answer is x=–6.

Step-by-step explanation: Step 1: Simplify both sides of the equation:

(-7)(x)+(-7)(6)=(4)(x)+(4 )(6) (Distributive Property)

-7x+-42=4x+24

-7x-42=4x+24

Step 2: Subtract 4x by the both sides: -7x-42-4x=4x+24-4x

-11x-42=24

Step 3: Add 42 to the both sides: -11x-42+42=24+42

-11x=66

And step 4: Divide both sides by -11: (-11x)/(-11)=(66)/(-11), x=-6.

I hoped this formula step-by-step is very helpful, please mark me as brainliest, and have a happy holidays! :D

A rectangular lot that measures 125 feet by 185 feet is completely fenced. What is the length, in feet, of the fence?Can you please explain with some details?

Answers

620, because 125+125+185+185=620, and that would be the perimeter of the rectangle.

The circles below are concentricWhat is the measure of the angle formed by the two secants?
What is the value of x?

Answers

Given:

Intercepted arcs of small circle:

78° and x°

Intercepted arcs of large circle:

57° and 121°

To find:

The measure of angle formed by two secants and the value of x.

Solution:

Consider a large circle:

The angle made by two secants intersecting outside a circle is half the difference between the measure of intercepted arcs.

$\Rightarrow \text{ angle} =(1)/(2)(121^\circ-57^\circ)

$\Rightarrow \text{ angle} =(1)/(2)(64^\circ)

$\Rightarrow \text{ angle} =32^\circ

The measure of the angle formed by two secants is 32°.

Two circles are concentric circles.

Therefore 32° is also the angle made by small circle arcs.

$\Rightarrow 32^\circ=(1)/(2)(x^\circ-78^\circ)

Multiply by 2 on both sides.

$\Rightarrow 2* 32^\circ= 2* (1)/(2)(x^\circ-78^\circ)

$\Rightarrow 64^\circ= x^\circ-78^\circ

Add 78° on both sides.

$\Rightarrow 64^\circ+78^\circ= x^\circ-78^\circ+78^\circ

$\Rightarrow 142^\circ= x^\circ

The value of x is 124.

Could you prove this trignometry identity? It's
sin x cot x =cos x

Answers

Cotx can also be written as cosx/sinx. So sinx × cosx/sinx = cosx.

Answer:

sinx ×cosx/sinx

sinx gets cancelled

cosx