tính bằng cách thuận tiện 1358x34+1358x42+1358x26-358x104+358x2

Bài 1: tính diện tích hình chữ nhật có chiều dài 12km , chiều rộng bằng 1/ chiều dài. Bài 2: một mảnh vường hình chữ nhật có chiều dài hơn chiều rộng 24m và chiều rộng bằng 2/5 chiều dài.tính diện tích mảnh vườn đó.

13 a. Tính nồng độ mol của dd thu được nếu như người ta cho thêm nước vào 400(g) dd NaOH 20% để tạo ra 3l dd mới. b. Cho 40 ml NaOH 1M vào 60ml KOH 0,5M. Tính nồng độ mol của mỗi chất thu được khi trộn 2 dd với nhau.

Các bạn giúp mình vớii mình cần gấp ạ . Bài 1: Choose the word of phrase in brackets that needs correcting in each sentence and correct it. Example: (The CDs) here are (more expensive) than (these) (over there). You have to choose (these) as this word needs correcting. Correct answer: these/ those 1. (The) film was (so bored) that I felt (asleep) (in) the middle of it. 2. (Some) artists have (few) or (no) formal art (training). 3. (Don't) forget (turning off) (all the) lights before you (go to) bed. 4. (When) Dave (returned) (to) his house, he (was reading) a book. 5.He always (drives) his car (too) fast (that) he often (causes) accidents. Bài 2: Use the correct form of the word given in each sentence. Example: The next stage in the ......... of television is interactive TV. (develop). Correct answer: The next stage in the development of television is interactive TV. 1. He is very ……… to everyone, so he has a lot of friends. (friend) 2. Five hundred people were made ……… by the hurricane. (home) 3. You’d better learn how to protect your property from earthquakes, floods and other natural ……… (disastrous) 4. The weather today was ……… hot. (extreme) 5. The kids were ……….. about the holiday. (excite)

14b Cần phải lấy bao nhiêu (g) tinh thể CuSO4.5H2O và bao nhiêu (g) H2O để được 250(g) dd CuSO4 16%

Giups mik vs trả lời bằng hình chụp càng tốt

Mọi người giúp mình câu 20 nha!

Help me, please!!!. Cảm ơn trước nha

Complete the second sentences using the word in brackets, beginning as shown: 1/ Nobody has explained why my flight is delayed. (reason) → Nobody has ______________________________ the delay to my flight. 2/ I’d rather you didn’t come to the meeting late. (prefer) → I’d __________________________________________ the meeting late. 3/ When Nhung wanted to buy a new bicycle, she had to save up for 6 months. (Nhung) → It ____________________________________ save up for a new bicycle. 4/ They are letting Dung out of hospital next weekend. (released) → Dung ___________________________________ hospital next weekend .5/ “Did you leave a tip for the waitress, Mum?” I asked. (he) → I asked my mother __________________________ a tip for the waitress. 6/ Khoa didn’t expect to win the prize, but he entered it anyway. (went) → Khoa didn’t expect to win the prize, but he _______________ it anyway

hãy vẽ lớp học trong mơ của em và viết cảm tưởng bằng tiếng anh