Cho tam giác ABC vuông tại A , đường cao AH . Gọi D và E lần lượt đối
xứng với H qua các cạnh AB và AC
a) C/m D, A , E thẳng hàng
b) C/m BCED là hình thang
c) C/m 0 90 DHE 

Answers

Answer 1

Answer:

Sorry i don't speak Vietnam so i can't help you if you write it in English i will have a chance to help you


Related Questions



given: c is parallel to d and a is parallel to b
prove angle 1 and angle 4 are supplementary

Answers

2 and 3 are supplementary
Property of adjacent interior angles

1 congruent to 2
Property of vertical angles

3 congruent to 4
Property of alternate interior angles

1 and 4 are supplementary
Transitive property

Which ordered pair is a solution of the equation y=x-2

A. (3,1)
B. (1,3)
C. (-1,3)
D. (3,-1)

Answers

Answer:

A. (3 , 1)

Step-by-step explanation:

Note the placement of x and y for points:

(x , y)

Plug in the corresponding numbers for the corresponding variables:

(x , y) = (3 , 1)

y = x - 2

(1) = (3) - 2

1 = 3 - 2

1 = 1 (True).

A. (3 , 1) is your answer.

~

PLEASE I NEED HELP!!!?!?

Answers

Answer:

A, E, and D

Step-by-step explanation:

Order the set of rational rumbers from least to greatest . 12.45, 12.54, 12.252, 12.41, 12.6, 12.51, 12.48 pls and thank u​

Answers

12.41, 12.45, 12.48, 12.51, 12.54, 12.6, 12.252 I think lol

Please solve the problem and show all steps, thank you.a-c=d+r, for a

Answers

Answer:

a = d + r + c

Step-by-step explanation:

a - c + c = d + r + c

a = d + r + c

PLEASE ANSWER THIS thank you

Answers

Answer:

the first first one is it can be written as a fraction this is the decimel that doesn't repeat nor terminates

Show all work and express your answers in scientific notation.

Change 56000 grams to Megagrams.

Answers

Answer: 0.056

What I did: divide the mass value by 1e+6

The speed of light is 299 792 458 m / s


Which decadic units can you round to so that only one non-zero digit is produced?

Answers

Answer:

299,792,460

Step-by-step explanation:

just round to the nearest 10th

Answer:

The speed of light is exactly 299,792,458 m/s because that is how a meter is defined. A meter is defined as the distance light travels in 1/299792458 seconds in vacuum. Why was this particular number chosen? To keep the definition of meter consistent with the old standard which was an actual physical bar. The length of this bar was arbitrary though.

Step-by-step explanation:

Your welcome :)

Find m∠XYZ, best answer gets Brainliest

Answers

Answer:

162

Step-by-step explanation:

theorem <w+<x=<y

5x+2+8x+4=15x-18

13x+6=15x-18

6+18=15x-13x

24=2x

12=x

------------

xyz=15x-18

15(12)-18

180-18

=162

Find f(g(x)) and g(f(x)) and determine whether each pair of functions f and g are inverses of each other (pls include work and a simple how-to)
1. f(x)
4x and g(x) = x/4

Answers

Answer:

Yes

Step-by-step explanation:

Given:

f(x) = 4xg(x) = x/4

Find the following:

f(g(x)) = 4*g(x) = 4*x/4 = xg(f(x)) = f(x)/4 = 4x/4 = x

Since f(g(x)) = g(f(x)) = x, the functions are inverses of each other.

f(x)=4xg(x)=x/4

[tex]\\ \sf\longmapsto f(g(x))=4(x/4)=x[/tex]

[tex]\\ \sf\longmapsto g(f(x))=4x/4=x[/tex]

f(x) and g(x) are inverse of each other

solve for u

-4+ u =-2

u=?

Answers

Answer:

u = 2

Step-by-step explanation:

Step 1: Simplify both sides of the equation.

[tex]-4 + u = -2[/tex] [tex]u - 4 = -2[/tex]

Step 2: Add 4 to both sides.

[tex]u - 4 + 4 = -2 + 4[/tex] [tex]u = 2[/tex]

Therefore, u = 2.

Solve the rational equation quantity 4 times x minus 1 end quantity divided by 12 equals eleven twelfths.
Answers:
x=2.5
x=2.7
x=3
x=4

Answers

Step 1 - write out the equation with numbers

4x - 1 divided by 1/12 = 11/12


Step 2 - multiply 12/1 to both sides

4x - 1 divided by 1/12 • 12/1 = 11/12 • 12/1


Step 3 - add 1 to both sides

4x - 1 + 1 = 11 + 1

4x = 12

Step 4 - divide 4 to both sides

4x/4 = 12/4

x = 3


Final answer

x= 3

Answer:

x=3 or C

Step-by-step explanation:

I just did the math and got it correct on my FLVS quiz

Find the value of x.

Answers

The triangle is always 180 degrees
6x + 8x + 7 + 8x - 3 = 180
Simplify
22x + 4 = 180
Minus 4 from both sides
22x = 176
Divide 22 by both sides
X = 8
Can I get brainliest answer

Answer:

x = 8

Step-by-step explanation:

All angles of a triangle must add up to 180 degrees.

So 8x + 7 + 6x + 8x - 3 = 180

Combine like terms

22x + 4 = 180

Subtract 4

22x = 176

Divide

22x ÷ 22 = 176 ÷ 22 = x = 8

We can make sure this is correct by plugging in 8 for all x terms.

8(8) + 7 + 6(8) + 8(8) -3

64 + 7 + 48 + 64 - 3 = 180.

X = 8

Hope this helps.

What is the equation of the line that passes through the point (-7, 2) and has a
slope of -1?

Answers

Answer:

y = -x- 5

Step-by-step explanation:

[tex]y-y_{1} =m(x-x_{1} )[/tex]

[tex]y-2=-1(x-(-7))[/tex]

[tex]y-2=-(x+7)[/tex]

[tex]y=-x-7+2[/tex]

[tex]y=-x-5[/tex]

I hope this help you

PLE HELPP ASAPPP RN I NEED HELP ON 1 AND 3 URGENTLY TYYY

Answers

Answer:

1.)a.)x is divided by two and is one is added to get y

b.)y=x/2 + 1

The rectangle has an area….

Answers

Answer:

5.5193237 times 10 to the power of -10

Step-by-step explanation:

To solve you just need to divided the area by the length or width the question has provided.  Please note I am in 7th grade.  

work out the value 4^2 x2^4

Answers

Answer

The answer to this equation would be 64. '^' just means multiplied by. It has the same mathematical definition as the multiplication sign.

Step-by-step explanation:

USING PEMDAS (NO PARENTHESES)

4 x 2 x 2 x 4

8 x 2 x 4

16 x 4

64

USING PEMDAS (WITH PARENTHESES)

(4 x 2) x (2 x 4)

(8) x (2 x 4)

(8) x (8)

64

64 is the answer ^the above explanation is correct

4x + 5
————
2
=9x - 3

Answers

Answer:

x=11/10=1.100

Step-by-step explanation:

A, B, and C are three points on a line. AC = 8, BC = 4,
and AB = 12. Which point must be between the other two
points?

Answers

abc/cba/bca

i’m not completely sure though, just a guess. hope this helps

Factor completely 16x4 − 81.

Answers

Answer:

-17

Step-by-step explanation:

Factor the polynomial.

-17

-17 is the answer your looking for

Someone can help me please?

Answers

Answer:

19 x 10^12 = 1.9 x 10 ^13

23 x 10^8 = 2.3 x 10^9

23 x 10^7 = 2.3 x 10^8

19 x 10^-12 = 1.9 x 10^-11

23 x 10^-8 = 2.3 x 10^-7

23 x 10^-7 = 2.3 x 10^-6

Step-by-step explanation:

Simplify the expression shown

Answers

46.5 is your answer

You start by doing 9x6=54
Then 54-7.5=46.5

Answer:

46.5

Step-by-step explanation:

9×6=54

54-7.5=46.5

Select ALL that could take P to Q:

Answers

Answer:

No question.

Step-by-step explanation:

What is the measure of angle ABE?
Please provide an explanation to your answer, thank you.

Answers

Answer:

50°

Step-by-step explanation:

According to the vertical angle theorem, two opposite vertical angles formed when two lines intersect each other are always equal (congruent) to each other.

This would mean CBD is equal to ABE which means ABE would be 50°.

find f(x)=x^2-x^3,find f(-10)

Answers

Answer:

Value of f(-10) is 1100

Step-by-step explanation:

Given that f(x) = x² - x³

Here we need to find f(-10).

 f(-10) =  (-10)² - (-10)³

 f(-10) = 100 - (-1000)

 f(-10) = 100 + 1000

 f(-10) = 1100

Value of f(-10) is 1100

What is the rate of change for the equation y = 2x + 100?
+
The rate of change is
h

Answers

Answer:

Rate of change = 2

Step-by-step explanation:

The rate of change is equivalent to the slope of the line !

A line is written:

y=mx+b

"m" is the slope, and "b" is the y-intercept !

The line you gave was "y=2x+100"

The slope, or "m," in your equation, would be 2 !

Find the slope from this equation
y=3x + 9
Show me how please

Answers

Answer: 3

Step-by-step explanation:

The slope is given by the coefficient of x, in an equation of the form y=mx+c.

Here, the slope, m = 3

Simplify the expression by combining any like terms:
X+4x-6y+7y

Answers

5x+y, because combining x’s (x+4x) is 5x and combing y’s (-6y+7y) is 1y or just y however you want to write it.
(X+4x)+(-6y+7y)
5x+y
Hope this helped

lcm.who knows this?

Answers

It could be the 36th

Please help!! BRAINLIEST to correct answer!!

Answers

Answer:

Here is your equation (x+2)^2+(y+10)^2=100

,  Hope this helps :)

Have a great day!!

Answer:

(x+2)²+ (y+10)²=100

Step-by-step explanation:

y=6x+2    P(-2,0)

x=-2

y=6 × (-2) + 2

y= -12+2

y= -10

M(-2,-10)      r= 0 - ( - 10 ) = 10

(x+2)²+ (y+10)²=100

Hope this helps!! Can I get brainliest?? Anyways have a great day!! :3

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