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

Somebody explain!!!!!!!!!!!

Answers

Answer:

$190

Step-by-step explanation:

Let's call the original price of the jacket "x".

If the new cost of the jacket is $87, we can represent this as x/2-8=87. By solving for x, we see that the original price of the jacket is $190

Answer:

I think the answer would be 182

Step-by-step explanation:

87x2= 174

174+8= 182

B
A
How many degrees must
Figure A be rotated
counterclockwise around
the origin in order to line
up with Figure B?
A. 90
B. 180
C. 270
D. 360

Answers

Answer:

A 90 degrees because the triangle is at a right angle and to rotate it counter clockwise

The answer is letter B. 180

A store is having a sale where all shoes are discounted by 25%. Diego has a coupon for 2% off of the regular price for one pair of shoes. The store first applies the reduced price. If Diego pays $24.38 for a pair of shoes, what was the original price before the sale and without the coupon?

Answers

Answer:

28.47  sorry if I am wrong

Step-by-step explanation:

what are all the possible ratios that can be made out of 32:56

Answers

Answer: 4:7

Explanation: To find the possible ratio, you first have to divide 32 and 56 into their lowest terms to find your answer. Hope this helps :)

Which statement corresponds to the values of x shown on the following number line? (Gray line is answer, dark black line is just number line)

a) -4 5x<2
b) -4 c) -45x>2
d) -42 x > 2

Answers

Answer:

a)-4 5×<2

Step-by-step explanation:

#CarryOnLearning

What is an equation of the line that passes through th (3,-1) and has a slope of 2?​

Answers

The given point to us is (3,-1) and the slope of the line is 2 . We can use the point slope form of the line as ,

[tex]\sf\longrightarrow m ( x - x_1) = y - y_1[/tex]

Substitute the values ,

[tex]\sf\longrightarrow 2( x - 3 ) = y - (-1) [/tex]

Simplify LHS and RHS ,

[tex]\sf\longrightarrow 2x - 6 = y +1 [/tex]

Put all terms on one side ,

[tex]\sf\longrightarrow \boxed{\bf 2x - y -7=0} [/tex]

Find the y-intercept of the line.
y=-1.4x + 6.9

Answers

Answer:

The y-intercept is 6.9

Step-by-step explanation:

The formula is y = mx + b, where m is slope and b is y-intercept.

Hope this helped :)

Could someone help answer this, please no spam, thank you, will give brainliest, homework help,!

Answers

Answer:

Inequality form: b > 8

please help me
3x≤21

x≤__?

Answers

Answer:

divide both sides by 3

givea you

x<= 7

Kate's Pattern
Andy's Pattern
Kate and Andy made the following
patterns.
X
у
Х
у
1
2
1
4
Which statement is true?
2
4
2
8
3
6
3
12
4
8
4
16
) Kate's y-values increase at 3 times the rate of Andy's y-values.
® Kate's y-values increase at 2 times the rate of Andy's y-values.
© Andy's y-values increase at 2 times the rate of date's y-values.
D Andy's y-values increase at 3 times the rate of Kate's y-values.

Answers

Answer:

Answer is C

Andy's Y value increases 2 times more

Answer:

B)

Step-by-step explanation:

If you look at Kate's y column, you will see that her pattern goes by 2,4,6 and 8.

It increases by 2.

At the same rate, Andy's increases by 4.

Therefore, B would be the correct answer.

What is the slope of the line that passes through (-12, -5) and (0, -8)?

Answers

Answer:

-1/4

Step-by-step explanation:

Use the slope formula

m=[tex]\frac{y_2-y_1}{x_2-x_1}[/tex]

[tex]\frac{-8-(-5)}{0-(-12)}[/tex]

Which equals -1/4

Question is in the pic :)

Answers

Answer:

d+d=e

Step-by-step explanation:

Is this correct?
If it’s not, help me :(

Answers

if you are just plotting the points it would be;

W - (-2,-2)
X - (-2, 1)
Y - (2, 1)
Z - (4, -2)

please help me on this question ASAP
i need it dont by midnight and its already 10:30.

Answers

Answer:

a) 3(17 )+ 4(9) = 81

b) 13.5m/s^2

Step-by-step explanation:

trust

Which point is an x-intercept of the quadratic function
f(x) = (x – 3)(x + 2)?

A(3, 0)

B(0, 2)

C(0, -2)

D(-3, 0)

Answers

Answer:

A

Step-by-step explanation:

The x-intercepts are the roots of a parabola. Specifically, when a parabola is in the form [tex]f(x)=(x-h)(x-k)[/tex], where h and k are real numbers, the roots are [tex](h, 0)[/tex] and [tex](k, 0)[/tex].

Our parabola has a plus, though. That's a problem, right?

No! [tex]x+2=x-(-2)[/tex], so there's no problem. So, our roots are [tex](3, 0)[/tex] and [tex](-2, 0)[/tex].

So, the answer is A and we're done!

Simplify the expression (3 − 4)(6 + 7) − (2 − 3). show your work

Answers

Answer:

-12

Step-by-step explanation:

[tex]=-1\cdot \left(6+7\right)-\left(2-3\right)\\=-1\cdot \:13-\left(2-3\right)\\=-13-\left(-1\right)\\=-12[/tex]

1. Refer to the equation 2x − 4y = 12.
(a) Create a table of values for at least 4 points. Show your work on how you found the values for each coordinate pair, and validated the points were on the line.

Answers

First, you rearrange the equation to = y.

Next, you choose a set of 4 points as your x values.

Then, plug in your x values to the rearranged equation (which I boxed in). What results are your corresponding y values.

Lastly, to check work plug in your x and corresponding y values to the original equation to make sure they all = 12.

Here’s the work written out:

Rewrite the quadratic function in standard form,
f(x)=3x^2-4x

Answers

Answer:

x(3x-4)

Step-by-step explanation:

-b/2(1) I think this is the formula

There are 300 people attending a conference. If each table at the conference can seat 3 people, how many tables will the conference need?

Answers

Answer:

100

Step-by-step explanation:

300 divided by 3

the 300 people would by divided into groups of three which means there would by 100 tables

Karen wanted to cut three lengths of wood from a 10 foot long board. The length of three pieces she wanted to were 1 2/3 feet 2 3/4 feet and 3 5/6 feet

Answers

[tex]\\ \sf\longmapsto 1\dfrac{2}{3}+2\dfrac{3}{4}+3\dfrac{5}{6}[/tex]

[tex]\\ \sf\longmapsto \dfrac{5}{3}+\dfrac{11}{4}+\dfrac{23}{6}[/tex]

[tex]\\ \sf\longmapsto \dfrac{20+33+46}{12}[/tex]

[tex]\\ \sf\longmapsto \dfrac{99}{12}[/tex]

[tex]\\ \sf\longmapsto 8.2ft[/tex]

Rope left

[tex]\\ \sf\longmapsto 10-8.2=1.8ft[/tex]

Answer:

1¾ ft ≈ 1,75 ft

Step-by-step explanation:

[tex] \sf 1\frac{2}{3} + 2 \frac{3}{4} + 3\frac{5}{6} [/tex]

[tex] \sf = \frac{3 + 2}{3} + \frac{4 \times 2 + 3}{4} + \frac{6 \times 3 + 5}{6} [/tex]

[tex] = \sf \frac{5}{3} + \frac{11}{4} + \frac{23}{6} [/tex]

[tex] \sf = \frac{5 \times 4 + 11 \times 3}{3 \times 4} + \frac{23}{6} [/tex]

[tex] = \sf \frac{20 +33 }{12} + \frac{23}{6} [/tex]

[tex] \sf = \frac{53}{12} + \frac{23}{6} [/tex]

[tex] = \sf \frac{53}{12} + \frac{23 \times 2}{6 \times 2} [/tex]

[tex] \sf = \frac{53}{12} + \frac{46}{12} [/tex]

[tex] \sf = \frac{99}{12} [/tex]

[tex] \sf = \frac{10}{1} - \frac{99}{12} [/tex]

[tex] \sf = \frac{10 \times 12 - 99}{12} [/tex]

[tex] = \sf \frac{120 - 99}{12} [/tex]

[tex] \sf = \frac{21}{12} [/tex]

= 1¾ ft ≈ 1,75 ft

solve for y
2x+3y=r

(Show solving steps please)

Answers

2x + 3y = r

---Subtract 2x from both sides

3y = r - 2x

---Divide both sides by 3

y = (1/3)(r) - (2/3)(x)

Hope this helps!! :)

2 For each figure, are 21 and 22 adjacent angles or vertical angles? Explain.
b.
a.
2

Answers

Answer:

a is vertical and b is adjacent angles

For each graph below, state whether it represents a function. HELP!! ​

Answers

1.Yes 2.No 3.Yes 4.Yes 5.No 6.Yes

There are 454 grams in a line. There are 16 ounces in a pound.How many grams are in an ounce?

Answers

Answer:

28.375 (rounded to 29 grams)

Step-by-step explanation:

there are about 454 grams in a pound and 16 ounces in a pound, so to find the relationship we divide 454 by 16 to get 28.375 or about 29 grams

Pls answer ASAP timed assignment

Answers

Answer:

A and C

Step-by-step explanation:

Answer:

a and c are right

Step-by-step explanation:

the base must be the number and the exponent is how many times it is multiplied

Write an equation of a line in point-slope form with the
information given.
1. passes through: (6, 0); slope: - 1/6

Answers

Answer: (y − 0) = -(1/6)(x − 6)  or y=-(1/6)(x-6)

Step-by-step explanation:

An equation in Point Slope form:  y − y1 = m(x − x1), where m is the slope and x1 and y1 are provided as a single point, (x1,y1).  We have slope(m) = -(1/6) and are given (6,0).  Therefore:

 (y − 0) = -(1/6)(x − 6)  (Point slope form)

y = -(1/6)(x-6)

Rewriting this into standard form, y = mx + b

y = -(1/6)x + 1

What is an equation of the line that passes through the point (-6,-1) and is perpendicular to the line 6x-y=7

Answers

Answer:

y=-1/6x-2

Step-by-step explanation:

Lets find the slope of the given line

6x-7=y,m=6

The slope of the perpendicular line would be=-1/6

Using the point-slope form y-y1=m(x-x1)

y--1=-1/6(x--6)

y+1=-1/6(x+6)

6y+6=-x-6

6y=-x-6-6

6y=-x-12

y=-1/6x-2

Is 2750 a reasonable answer for 917 * 33 explained

Answers

Answer:

No

Step-by-step explanation:

To make this simpler, we will round each number. 917 rounds to 900 and 33 rounds to 30. 900 * 30 = 27,000. We can do this in our head because 9 * 3 = 27, and there are three zeros total between 900 and 30, so we add three zeros after 27. 2750 is not a reasonable answer because the true answer is about 10 times greater than 2750.

Which of the following are valid names for the given triangle? Check all that apply

Answers

Step-by-step explanation:

i think the answer is c MAX

I need help w/ this please help me!!

Answers

Answer:B

Step-by-step explanation:

B

Answer:

y = -4/3x - 4

Step-by-step explanation:

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