Đáp án:
Giải thích các bước giải:
(20√12-15√27):5√3
=>(20$\sqrt{4.3}$ -15$\sqrt{9.3}$):5√3
=>(40√3-45√3):5√3
=>-5√3:5√3
⇒-1
`(20sqrt{12}-15sqrt{27}):5sqrt{3}`
`=4sqrt{4}-3sqrt{9}`
`=8-9=-1`
học tốt :)
Giúp hộ hứa vote cảm ơn đủ 1/ Although the weather is cold,we go swimming → Despite........................... 2/ Even though he was poor, he studied well. → In spite of.......................... 3/Though they trained hard, they lost the match. → Despite..........................
Tính bằng cách thuận tiện nhất 3/5 × 8/27 × 5/3
Hộ vs lm diễn giải nh k km tắt Mơn trc
Qua 4 điểm không thẳng hàng vẽ được bao nhiêu đường thẳng
Giải bài hộ em với được không ạ
Bài 1 : Tìm x a, $\frac{-2}{15}$ - x = $\frac{-3}{10}$ b, x + $\frac{1}{3}$ = $\frac{2}{5}$ - ( $\frac-{1}{3}$ ) c, $\frac{3}{7}$ - x = $\frac{1}{4}$ - ( $\frac-{3}{5}$ )
Trong hình nha. Vui lòng hk chép mạng hay trong ảnh nha Cần trc 9h ngày mai
Hãy nêu các đặc điểm của địa hình Châu Á Miền núi : Miền đồng bằng :
. Hòa tan hai muối X, Y vào nước được 1 lit dung dịch chứa: [Zn2+] = 0,2M; [Na+] = 0,3M; [ ] = 0,15M; [ ] = p (M). a. Tính p b. Tìm công thức hai muối X, Y ban đầu. Tính khối lượng mỗi muối đem hòa tan.
1. Our teacher allowed us to stay home to learn for our test Our teacher let__________ 2. The child wanted to go out alone Sandy let___________ 3. Jenny climbed up the roof They saw__________ 4." The rain fell on my face" She said She felt__________ 5. Mother thinks I am old enough to decide on my own Mother lets_____________ 6. The teacher allowed me to stay at home to finish the assignment The teacher let_____________ 7. The boy ran away from house She noticed____________ 8. He said that he didn't want to learn Math I overheard_______________ 9. May be the school will ask me to pay some extra money Do you think the school will make___________ 10. Walking in the rain is her enjoyment She enjoys____________ 11." If I were you, I would accept her offer" said George George advised___________ 12." Would you like to go to the movies with me tomorrow evening?" Tom said to Maria Tom invited_____________ 13. He wrote the letter in two hours It took__________ 14." Let's go swimming," she said She suggests__________ 15. It is a three- hour drive from Hanoi to Nam Dinh It takes___________ 16. It is necessary to finish the work today You need_________
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