Ai biết thì giúp mik nha
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Mik thanks nhìu
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\(\left(x+\dfrac{1}{3}\right)\times\dfrac{9}{14}\times\dfrac{7}{3}-\dfrac{1}{3}=1:\dfrac{9}{5}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}-\dfrac{1}{3}=\dfrac{5}{9}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{5}{9}+\dfrac{1}{3}\\ \Rightarrow\left(x+\dfrac{1}{3}\right)\times\dfrac{3}{2}=\dfrac{8}{9}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{8}{9}:\dfrac{3}{2}\\ \Rightarrow x+\dfrac{1}{3}=\dfrac{16}{27}\\ \Rightarrow x=\dfrac{16}{27}-\dfrac{1}{3}\\ \Rightarrow x=\dfrac{7}{27}\)
\(50\%+\dfrac{1}{2}+\dfrac{1}{7}\times\dfrac{2}{5}+\dfrac{1}{7}\times\dfrac{3}{5}\)
\(=\dfrac{1}{2}+\dfrac{1}{2}+\dfrac{2}{35}+\dfrac{3}{35}\)
\(=1+\dfrac{5}{35}\)
\(=1+\dfrac{1}{7}\)
\(=\dfrac{8}{7}\)
\(50\%+\dfrac{1}{2}+\dfrac{1}{7}x\dfrac{2}{5}+\dfrac{1}{7}x\dfrac{3}{5}\)
\(=\dfrac{1}{2}+\dfrac{1}{2}+\dfrac{1}{7}x\left(\dfrac{2}{5}+\dfrac{3}{5}\right)\)
\(=1+\dfrac{1}{7}x1\)
\(=\dfrac{7}{7}+\dfrac{1}{7}=\dfrac{8}{7}\)
50% + 1/2 + 1/7 × 2/5 + 1/7 × 3/5
= 1/2 + 1/2 + 1/7 × (2/5 + 3/5)
= 1 + 1/7 × 1
= 1 + 1/7
= 7/7 + 1/7
= 8/7
Spring is the beginning of a year. Around this time, the climate is still cold and humid. There are still some small drizzles outside but they seem not be able to stop the hundreds of colorful flowers blooming. Peach blossoms, apricot blossoms and lime trees are the most favorite plants for the Lunar New Year. Apricot blossom is yellow, peach blossom is pink, these color brighten up the sky. Spring arriving means that with New Year is coming. At this moment, everyone's heart is throbbing. The roads are filled with vehicles, everyone is happy, they go shopping to prepare for Tet holiday such as buying trees, clothes, foods.Traditionally, all of houses hang red sentences in front of the house, plant trees, wrap green cake to eat with melon onion. This is a characteris that only Vietnam has, leaves impression on the tourists. Children are especially happy to wear new clothes and receive red envelopes, are taken to visit the relatives. For me, the spring is so special, it carries so much love and happiness.
bạn thamkhaor nha
Spring has long been called the season of the festivals. Especially in some Asia countries including Vietnam, at this time there are many big and small festivals taken place all over the country. First of all, Tet is the most important event of our country. It just for a week but is well-received and well prepared. Everyone is looking forward to Tet, they go shopping for the New Year from December twenty one, prepare some items such as bonsai, candy, clothes, ..... This is a chance for them to remember their ancestors, spend time together, give each other best wishes, ... Besides Tet, there are many other festivals in the spring. Many people tend go to pagodas, temples, find the ancient land to pray for the family healthy and peaceful. Some families book themselves a short vacation, go to the famous sightseeing tours, recharge energy for a new year. Maybe spring makes people excited and happy because it has so many festivals. Thus, when talk about spring, people often think of joy, excitement.
ta sử dụng công thức sau: (lượng nước ban đầu - lượng nước sau khi phơi) / lượng nước ban đầu * 100%. Trong trường hợp này, lượng nước ban đầu là 200kg và lượng nước sau khi phơi là 100kg. Áp dụng công thức, ta có: (200kg - 100kg) / 200kg * 100% = 50%. Vậy, lượng nước trong hạt khô chiếm 50%.
Sau lần xuất quân thứ nhất số phần trăm vận động viên còn lại:
\(100\%-60\%=40\%\)
Sau lần xuất quân thứ hai số phần trăm chỉ vận động viên còn lại:
\(40\%\times50\%=20\%\)
Tổng số vận động viên là:
\(141:20\%=705\) (vận động viên)
Tổng số vận động viên xuất quân trong 2 đợt đầu tiên:
\(705-141=564\) (vận động viên)
Đáp số: 564 vận động viên
bn ơi cho mik hỏi là tại sao 40% x 50% lại bằng 20 % nhỉ
mik vẫn chưa hiểu mấy
( 4,5 - \(\dfrac{4}{7}\) \(x\)): \(\dfrac{5}{6}\) = 0,6
(4,5 - \(\dfrac{4}{7}\)\(x\)) = 0,6 \(\times\) \(\dfrac{5}{6}\)
4,5 - \(\dfrac{4}{7}\) \(x\) = 0,5
\(\dfrac{4}{7}x\) = 4,5 - 0,5
\(\dfrac{4}{7}x\) = 4
\(x\) = 4 : \(\dfrac{4}{7}\)
\(x\) = 7
mình chỉ làm được bài 2 thôi là;
17 nhân 26,13 nhân 88,39 nhân 26
=442 + 1144 + 1014
=2600