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Butoxors [25]
3 years ago
13

Cho 4 điểm ABCD thỏa mãn điều kiện AB//CD; AD//BC. Gọi P và Q lần lượt là trung điểm của DC và BC. Gọi M là trung điểm của AB. G

ọi E, F lần lượt là giao điểm của BD với AP và CM; O là giao điểm của AC và BD.
a) Chứng minh O là trung điểm của AC và BD.
b) Chứng minh C, F, M thẳng hàng.
c) Chứng minh DE = EF = FB.
Mathematics
1 answer:
lina2011 [118]3 years ago
4 0

Answer:

i dont even know this language

Step-by-step explanation:

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Solve each system of equations; nonlinear algebra 2<br><br> x2 + x + y - 26 = 0<br> x + y = 1
BigorU [14]

Answer:

(5,-4) and (-5,6)

Step-by-step explanation:

Given:

\left\{\begin{array}{l}x^2+x+y-26=0\\ \\x+y=1\end{array}\right.

Solve it. First, express y in terms of x from the second equation:

y=1-x

Substitute it into the first equation:

x^2+x+1-x-26=0\\ \\x^2-25=0\\ \\(x-5)(x+5)=0

Apply zero product property:

x-5=0\ \text{or}\ x+5=0

So,

x=5\ \text{or}\ x=-5

When x=5, then y=1-5=-4

When x=-5, then y=1-(-5)=6

We get two solutions: (5,-4) and (-5,6)

8 0
3 years ago
⚠️⚠️Please help⚠️⚠️ Pip and Ali share S785 in the ratio Pip:Ali = 4:1.<br><br> Work out Pip's share.
oksano4ka [1.4K]
<h3>Answer:   $628 </h3>

==========================================================

Work Shown:

x = Ali's share

4x = Pip's share, because it is four times bigger due to the ratio 4:1

x+4x = 5x = total amount of money = 785

5x = 785

x = 785/5

x = 157 dollars is Ali's share

4x = 4*157 = 628 dollars is Pip's share

Note that 157+628 = 785 to help confirm the answer.

7 0
3 years ago
plz help! 7th grade advanced math!!!!! A car travels 1 /6 of the distance between two cities in 3/ 5 of an hour. At this rate, w
igor_vitrenko [27]
It would go 5/18 of the distance
6 0
3 years ago
Please hurry! Subtract using the number line. 7−(−1) A number line ranging from negative ten to positive ten, with increments of
Olenka [21]

The answer is -1

Hope this helps.

<em>UwU</em>

5 0
3 years ago
Read 2 more answers
The number of music CDs that Carl has in his collection is four less than triple the number of music CDs that Toni has in her co
grigory [225]
Ok, simple.
Carl has 4 less than triple the amount Toni has.
Toni has x amount of CDs.
Carl has 3x - 4 amount of CDs.

Hope this helps!
6 0
3 years ago
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