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saw5 [17]
2 years ago
11

Bài 4: 350 Cho tam giác ABC nhọn, hai đường cao BD, CE cắt nhau tại H. M là trung điểm của BC. K đối xứng với H qua M. a) Chứng

minh tứ giác BHCKlà hình bình hành b) Chứng minh BK LAB và CK AC. c) Gọi 0 là trung điểm của AK. Chứng minh OM IBC d) Gọi N là điểm đối xứng với H qua BC. Chứng minh BNKC là hình thang cần​
Mathematics
1 answer:
Dima020 [189]2 years ago
5 0
No sabo la respuesta jajaja
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After the 10% discount on marked price (P), the selling price is ...

... P×(100% -10%) = 0.90P

After a markup off 35% on cost, the value is

... $70×(100% +35%) = 1.35×$70 = $94.50

The retailer wants these two values to be equal:

... 0.90P = $94.50

... P = $94.50/0.90 = $105.00 . . . . . divide by the coefficient of P

The marked price should be $105.00.

6 0
2 years ago
what is the circumference of a circle with a radius of 6.1 centimeters? enter your answer as a decimal in the box. use 3.14 for
Savatey [412]
Circumference can be calculated by 2pi*r where r is the radius.

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8 0
3 years ago
What ratio is equivalent to the ratio 9:10
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18:20

Multiply each side by 2
6 0
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Mr Binnix wife is older than her sister by 2 years if their ages add up to 52 how old is each sister? Let c represent Leigh Ann’
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Answer:

the older sister is 27 and the younger is 25.

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The measurement of angel c is B.

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