Tính độ biến thiên nội năng của chat khi nhận một công 100j và truyền nhiệt ra mỗi trường 40j

Giải bất phương trình sau: $|\frac{1}{x}+1|\ge |\frac{1}{x}-2|$

làm hộ mình từ câu 1 đến câu 5 với

GIẢI THÍCH NỮA NHA IV. Complete the following sentences with the correct form of the verbs in brackets. 1. I (not be) ___________________ very happy yesterday. 2. The people in the café (not be) ___________________ friendly when I was there yesterday. 3. I (leave) ___________________ my school bag at school this morning. 4. It (be) ___________________ a great film in 2001. 5. Our teacher (tell) ___________________ us to be quiet yesterday. 6. I went to the shop but I (not have) ___________________ any money. 7. Susan (not know) ___________________ about the exam and she did very badly. 8. I (buy) ___________________ a ticket for the football match yesterday.

cho $\frac{a}{b}$ = $\frac{c}{d}$ chứng minh rằng $\frac{2a+5b}{3a-4b}$ = $\frac{2c+5d}{3c-4d}$ giúp tui đi các bạn

Hay so sanh lưc hut cua trai đât tac dung lên môt hon đa co khôi lương 1,5 kg vơi lưc hut cua trai đât tac dung lên qua ta co khôi lương 6 kg

giúp mình bài 1 nha hứa vote đủ 5sao

87. If you ……………….. the lesson, I’ll explain it again to you. (not understand) 88. If the rice paddies …………………., the rice plants ………………… (pollute / die) 89. John ………………… the first prize in the English speaking contest. (just / win) 90. Uncle Ho devoted his life …………………. the independence for Vietnam. (gain) 91. I think we …………………… some canned food before typhoon. (buy) 92. I suggest …………………… solar energy instead of coal, gas and oil. (use) 93. Why not ………………… another products ? (choose) 94. Let her ……………… her best to finish her work in time. (try) 95. Unfortunately, he ………………….. three accidents recently. (have) 96. A new photocopier …………………. in last week. (put) 97. He would be healthier, if he ……………… so much. (not, smoke) 98. Road users …………………… by law to wear quality safety helmets. (force) 99. Please wait right here until Katie …………………… back. (come) 100. His daughter is interested in ………………… with Barbie dolls. (play) 101. Mrs. Linda is busy ………………….. Christmas tree. (decorate) 102. They are the first customers ………………… and ………… things in the shop. (come / buy) 103. Do you have difficulty ………………….. a job after …………………. ? (find / graduate) 104. It was impossible to use fire-fighting equipment because most of the water pipes …………… before. (burst)

Tìm x biết. a) 15 - 3(x - 2) = 21; b) 25 + 4(3 - x) = 1 c) 5 – x = 17 –(-5) ; d) x – 12 = (-9) –(-15) ; e) 9 –25 = (-7 – x ) – (25 - 7) g) 11 + (15 - 11 ) = x – (25 - 9) h) 3x + 12 = 2x - 4; i) 14 - 3x = -x + 4 ; k) 2(x - 2)+ 7 = x – 25 m) 17 – {-x – [-x – (-x)]}=-16 n) x + {(x + 3 ) –[(x + 3) – (- x - 2)]} = x

Đặt câu có từ Đông mang nghĩa sau A. Đông chi một hướng ngược với hướng Tây: B. Đông chi một mùa trong năm: C. Đồng chí số lượng nhiều :