If the point (a, b) is equidistant from the points (-a, 2) and (2, -b), then prove that 3(a+b)+4=0​

Answers

Answer 1

Answer:  see proof below

Step-by-step explanation:

Since (a, b) is equidistant from (-a, 2) and (2, -b), then it is the midpoint of the those two points. Use Midpoint formula to find (a, b).

[tex]M_x=\dfrac{x_1+x_2}{2}\qquad \qquad \qquad M_y=\dfrac{y_1+y_2}{2}\\\\\\a=\dfrac{-a+2}{2}\qquad \qquad \qquad \quad b=\dfrac{2-b}{2}\\\\\\2a=-a+2\qquad \qquad \qquad \quad 2b=2-b\\\\\\3a=2\qquad \qquad \qquad \qquad \qquad 3b=2\\\\\\a=\dfrac{2}{3}\qquad \qquad \qquad \qquad \qquad b=\dfrac{2}{3}[/tex]

3(a + b) - 4 = 0

[tex]3\bigg(\dfrac{2}{3}+\dfrac{2}{3}\bigg)-4=0\\\\\\3\bigg(\dfrac{4}{3}\bigg)-4=0\\\\\\4-4=0\\\\0=0\qquad \text{TRUE!}[/tex]

Notice that I changed the equation to "negative 4" because the equation you provided did not make a true statement.


Related Questions

0.3x+5.14=2.1x – 4.4

Answers

Answer:

x = 5.3

Step-by-step explanation:

ehhh, i'm jus helping,

you're welcome :)

Answer:

53

To find:

x

Step-by-step explanation:

0.3x+5.14=2.1x – 4.4

0.3x-2.1x=-4.4-5.14

-1.8x=-9.54

x=-9.54/-1.8

To remove the decimal point, multiply with 100 on both numerator and denominator as their are two digits after the decimal point

x=-9.54 × 100/-1.8 × 100

therefore you will get,

x=-954/-180

cut the negative sign from both numerator and denominator

x=954/180

x=53

hope it helps you!!

Find the solution to the system of equations below and write your answer as an ordered pair.

y=2x-2

y=3x-7

Answers

Answer:

y=2x-2

Slope = 4.000/2.000 = 2.000

x-intercept = 2/2 = 1

y-intercept = -2/1 = -2.00000

y=3x-7

Slope = 6.000/2.000 = 3.000

x-intercept = 7/3 = 2.33333

y-intercept = -7/1 = -7.00000

If this was helpful please mark brainliest. Have a great day.

Answer:

(x,y)=(5,8)

y=8

x=5

Step-by-step explanation:

Method 1 ; Substitution Method

[tex]\begin{bmatrix}y=2x-2\\ y=3x-7\end{bmatrix}\\\\\mathrm{Subsititute\:}y=3x-7\\\\\begin{bmatrix}3x-7=2x-2\end{bmatrix}\\\\Isolate\:x \:for\:3x -7=2x-2\:\:,x=5\\\\\mathrm{For\:}y=3x-7\\\\\mathrm{Subsititute\:}x=5\\\\y=3\times\:5-7\\\\Simplify\\\\y=8\\\\y=8,\:x=5[/tex]

Method 2 : Elimination Method

[tex]\begin{bmatrix}y=2x-2\\ y=3x-7\end{bmatrix}\\\\\mathrm{Arrange\:equation\:variables\:for\:elimination}\\\\\begin{bmatrix}y-2x=-2\\ y-3x=-7\end{bmatrix}\\\\y-3x=-7\\-\\\underline{y-2x=-2}\\-x=-5\\\\\begin{bmatrix}y-2x=-2\\ -x=-5\end{bmatrix}\\\\Solve\:-x=-5\:for\:x \:,x =5\\\\\mathrm{For\:}y-2x=-2\mathrm{\:plug\:in\:}x=5\\\\Solve \:y-2\times 5 =-2\:for\:y\:\: ,y =8\\\\y=8,\:x=5[/tex]

Method 3 : Gaussian's Elimination

[tex]\begin{bmatrix}y=2x-2\\ y=3x-7\end{bmatrix}\\\\\mathrm{Arrange\:equation\:variables\:for\:elimination}\\\\\begin{bmatrix}y-2x=-2\\ y-3x=-7\end{bmatrix}\\\\\mathrm{Write\:a\:matrix\:with\:the\:coefficients\:and\:solutions}\\\\\begin{bmatrix}1&-2&¦&-2\\ 1&-3&¦&-7\end{bmatrix}\\\\Reduce \:matrix\:to\:echelon\:form\\\\\begin{bmatrix}1&0&¦&8\\ 0&1&¦&5\end{bmatrix}\\\\y=8,\:x=5[/tex]

in the diagram below AB CD. If <7 = 52 °, then what is the measure of <4

Answers

the measure of the angle 4 should be 38°

What is the angle in both radians and degrees determined by an arc of length 4π meters on a circle of radius 16 meters? NOTE: Enter the exact answers. Do not include symbols in the answer boxes. The angle, in radians, is The angle, in degrees, is

Answers

The formula to determine the angle subtended by an arc is:θ = (L/r), where θ is the angle in radians, L is the length of the arc, and r is the radius of the circle.

We are given a circle with a radius of 16 meters and an arc length of 4π meters. Therefore, we can plug in the values of L and r to obtain the angle in radians:

θ = (L/r) = (4π/16) = π/4 radians

We can convert radians to degrees using the formula:

π radians = 180 degrees

Therefore, we can convert the angle in radians to degrees as follows:

θ (in degrees) = (θ in radians) × (180/π) = (π/4) × (180/π) = 45 degrees

Hence, the angle subtended by an arc of length 4π meters on a circle of radius 16 meters is π/4 radians or 45 degrees.Conclusion:Thus, the angle, in radians, is π/4 and the angle, in degrees, is 45 degrees.

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Simplify the expression:
-4z + 2z + -4z + -5z

Answers

Answer: -11

Step-by-step explanation:

Which of the following is correct?

Answers

A, C, D are the answers

Multiply, but do not simplify.
Captionless Image

Answers

Answer:

Please add context

Step-by-step explanation:

Answer:

Add an image first

Step-by-step explanation:

Will Mark Brainliest

Answers

Answer:

3,2

No explantation needed,

Write the prime factorization of using exponents.
The prime factorization of 5184 is ______________

Answers

Answer:  26∗34 2 6 ∗ 3 4

Step-by-step explanation:

how many are 16 x 16 ?​

Answers

Answer:

256

Step-by-step explanation:

16 ×16= 256

Hope it works out for you

Pianists and musicians as a conditional statement

Answers

"If you are a pianist, you are a musician"

sorry if I'm incorrect, we didn't spend much time on conditional statements

Cual es la medida por lado de la siguiente figura
A=48
X+3
X+5

Answers

The side measures for the figure in this problem are given as follows:

6 units and 8 units.

How to obtain the area of a rectangle?

To obtain the area of a rectangle, you need to multiply its length by its width. The formula for the area of a rectangle is:

Area = Length x Width.

The dimensions for this problem are given as follows:

x + 3 and x + 5.

As the area is of 48 square units, we have that:

(x + 3)(x + 5) = 48

x² + 8x + 15 = 48

x² + 8x - 33 = 0.

The coefficients are given as follows:

a = 1, b = 8, c = -33.

Using a quadratic function calculator, the positive root is given as follows:

x = 3.

Hence the dimensions are:

x + 3 = 6.x + 5 = 8.

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Find the y intercept of the line on the graph

Answers

The answer would be -2.

Step-by-step explanation:

The line crosses through the - 2.

Answer:

y intercept would be -2

Step-by-step explanation:

y intercept means at what point first crosses the line at the y axis. \

That would be -2

The volume of the Venus is approximately 9.4 x 10^11 km^3. The volume mars is approximately 1.6 x 10^11.


Part A: about how many times as great as the volume of mars is the volume of Venus? Round to the nearest tenth.


Part B: the volume of earth is approximately 0.69 x 10^-1 times larger than the volume of mars. What is the approximate volume of earth?

Answers

Answer:

Step-by-step explanation:

Given

volume of the Venus = 9.4 x 10^11 km^3

The volume mars is approximately = 1.6 x 10^11km³

A) In order to know how many times as great as the volume of mars is the volume of Venus, we take the ratio of volume of Venus to volume of mars.

Ratio = volume of Venus/volume of mars

Ratio = 9.4 x 10^11 km³/1.6 x 10^11km³

Ratio = 9.4/1.6

Ratio = 5.875

Ratio = 5.9(to the nearest tenth)

Hence the volume of venus is approximately 5.9 great as volume of mars.

B) If volume of earth is approximately 0.69 x 10^-1 times larger than the volume of mars, then the amount by which earth is greater than mars is expressed as:

0.69 x 10^-1 × volume of mars

= 0.69 x 10^-1 × 1.6 x 10^11.

= 1.104×10^{-1+11}

= 1.104×10^10

Volume of earth will be 1.104×10^10+1.6 x 10^11.

Volume of earth = 0.1104×10^11+1.6 x 10^11.

Volume of earth = 1.7104×10¹¹ km³

Hence the approximate volume of earth is 1.7104×10¹¹km³

The volume of Mars is 5.875 times greater than the Volume of earth.

Volume is a quantity expressing the amount of three-dimensional space enclosed by a closed surface. It shows how much space there is within a three-dimensional object.

Part A:

Comparison of Venus to Mars = 9.4 x 10^11 km³ / 1.6 x 10^11 km³ = 5.875

Part B:

Volume of earth = 1.6 x 10^11 + (1.6 x 10^11 * 0.69 x 10^-1) = 1.7104 * 10¹¹ km³

The volume of Mars is 5.875 times greater than the Volume of earth.

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Find the positive value of x that makes the equation true,
x2 + 4x = 4(x + 16)

Answers

Answer:

x=8

Step-by-step explanation:

(8)2 + 4(8)= 4x + 16

16 + 32 = 4(8) + 16

48= 32+16

48=48

The opposite corners of a quadrilateral are right angles. What kind of quadrilateral is this figure?

Answers

Answer:

Send a picture for a full answer.

Step-by-step explanation:

Answer:

Rectangle or square

Step-by-step explanation:

76km/hr=_______________________________m/s

Answers

The answer is 21.1111 m/s

Answer:

21.1111 m/s

Step-by-step explanation:

If the equation y = 3x - 1 were graphed on the xy-coordinate plane, which of the following
would NOT be a point on that graph?
A.(-2,-7)
B.(2,5)
C.(-1,-3)
D.(0,-1)

Answers

Answer:

C

Step-by-step explanation:

If you substitute the x-value of every coordinate into the equation, C is the only one that doesn't have the right y-value

Answer:-1,-3

Step-by-step explanation:

what are the zeros of the function graph the function. y=x(x 2)(x 5)

Answers

the zeros of the function are x = 0, x = -5.

The given function is y = x(x²)(x + 5).

To find the zeros of this function, we need to set y equal to zero and solve for x.

So, y = 0x(x²)(x + 5) ⇒ 0 = x(x²)(x + 5)

We can see that the left side is zero. So, either x or (x²)(x + 5) is zero.

Thus, the zeros of the function are: x = 0, x² = 0

⇒ x = 0, x + 5 = 0

⇒ x = -5

Therefore, the zeros of the function are x = 0, x = -5.

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PLS HELP.!!!!!!!!!!!

Answers

Answer:

35040

Step-by-step explanation:

3.48(104)+0.24(103)

=35040

Answer:

umm here 35,040

Step-by-step explanation:

So how do you do ratios and rates and portions im failing in math and i dont know what to do can you help?

Answers

Answer:

The most common way to write a ratio is as a fraction, 3/6. We could also write it using the word "to," as "3 to 6." Finally, we could write this ratio using a colon between the two numbers, 3:6. Be sure you understand that these are all ways to write the same number.

A rate is a special ratio in which the two terms are in different units. For example, if a 12-ounce can of corn costs 69¢, the rate is 69¢ for 12 ounces. The first term of the ratio is measured in cents; the second term in ounces. You can write this rate as 69¢/12 ounces or 69¢:12 ounces.

a particle moves in a circle 1.50 m in radius. through what angle in radians does it rotate if it moves through an arc length of 2.50 m? what is this angle in degrees?

Answers

The angle through which the particle rotates in radians is 1.67 radians, while the angle in degrees is 605° (rounded to the nearest degree).

A particle moves in a circle of radius 1.50 m. If it moves through an arc length of 2.50 m, we are to determine the angle through which it rotates in radians and in degrees.

Let the angle through which it rotates be denoted as θ, and the radius of the circle be denoted as r, thus, we can write:

L = rθ

where L is the length of the arc. We are to determine θ if r = 1.50 m and L = 2.50 m.

Substituting L = 2.50 m and r = 1.50 m into L = rθ, we have: 2.50 m = 1.50 mθ

Dividing both sides by 1.50 m, we obtain:

θ = 2.50 m / 1.50 m = 1.67 radians

The angle through which the particle rotates in radians is 1.67 radians, while the angle in degrees is 605° (rounded to the nearest degree).

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Please help me with disss

Answers

Answer:

-4

Step-by-step explanation:

Answer:

mk so a while back u posted an anser to a math question and I needed to tell u ur sner made NO SENSE BECAUSE YOU SAID "none of them" AND THAT WASNT AN OPTION

help please I really really need help
A function f represents the percentage of life remaining in a cell phone battery. The life of a cell phone battery is dependent on the number of minutes, a, that a cell phone has been in use. In the context of the problem, explain the meaning of the following statements:


f(22)



f(a)=50

Answers

Answer:

In 22 minutes the remaining cell phone battery will be unknown.  

In a of minutes the remaining cell phone battery will be 50%.

Step-by-step explanation:

which algebraic expression has a term with a coefficient of three A: -2y+5+3 B: 3(y-6) C: 3y+1 D: 5y-7

Answers

Answer:

b

Step-by-step explanation:

at the left hand side the coefficient is 3

B

A coefficient is a number multiplied by a variable
Ex: 14x 14x 14x 14 is the coefficient

The—————-of a graph is the location where the graph crosses the x-axis

Answers

Answer:

I believe the answer is x-intercept

Step-by-step explanation:

What is the value of x in the equation x^3 + 2 = 10?

Answers

Answer:

x = 2

Step-by-step explanation:

Step 1: Write equation

x³ + 2 = 10

Step 2: Solve for x

Subtract 2 on both sides: x³ = 8Cube root both sides: x = 2

Step 3: Check

Plug in x to verify it's a solution.

2³ + 2 = 10

8 + 2 = 10

10 = 10

Answer:

2

Step-by-step explanation:

X³+2=10

-2 -2

X³=8

X=2

What number can be multiplied by itself 3 times that makes 8?

2×2=4×2=8

anyone know the answer?

Answers

Answer:

95 degrees

Step-by-step explanation:

One and 4 are vertical, meaning they are congruent

4 and 8 are corresponding meaning they are congruent

8 & 7 are supplementary meaning they add up to 180 degrees

Hope this helps :-)

PLEASE HELP. ill pick brainliest or whatever idk ANYTHING i literally know how to do stuff like this but im brain dead atm someone just help pls 3

Answers

Answer:

D)45 and 45

Step-by-step explanation:

Isosceles right triangle is a triangle with one 90 degree angle and two equal sides and angles, meaning two 45 degree angles

Astronauts increased in height by an average of approximately 40mm (about an inch and a half) during the Apollo Soyuz missions, due to the absence of gravity compressing their spines during their time in space. Does something similar happen here on Earth? An experiment supported by NASA measured the heights of six men immediately before going to bed, and then again after three days of bed rest. On average, they increased in height by 14mm, with standard deviation 0.66mm. Find the 95% confidence interval for the change in height after three days of bed rest.

Answers

The confidence interval for the change in height after three days of bed rest is approximately (13.308, 14.692) mm.

So we can be 95% confident that the true change in height after three days of bed rest falls within this interval.

How to find the cofidence interval?

To find the 95% confidence interval for the change in height after three days of bed rest, we can use the formula for a confidence interval for the mean difference in paired data:

CI = x ± t * (s / √n)

Where the variables are:

x is the sample mean difference (average change in height),t is the critical value from the t-distribution for the desired confidence level (95% confidence corresponds to a t-value with 5 degrees of freedom, which is approximately 2.571),s is the sample standard deviation of the differences (given as 0.66mm),n is the sample size (given as 6).

Let's calculate the confidence interval:

x = 14mm (average change in height)t = 2.571 (critical value for 95% confidence level with 5 degrees of freedom)s = 0.66mm (sample standard deviation of the differences)n = 6 (sample size)

CI = 14 ± 2.571 * (0.66 / √6)

Calculating the value inside the parentheses:

0.66 / √6 ≈ 0.2691

Calculating the confidence interval:

CI = 14 ± 2.571 * 0.2691

CI = 14 ± 0.692

That is the confidence interval.

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