Giải thích các bước giải:
Ta có :$5(5a+2b)+(9a+7b)=34a+17b=17(2a+b)\quad\vdots\quad 17$
$\to 5a+2b\quad\vdots\quad 17\leftrightarrow 9a+7b\quad\vdots\quad 17$
$5(5a+2b)+(9a+7b)=34a+17b=17(2a+b)⋮175$
$→5a+2b⋮17↔9a+7b⋮17$
giúp mik 2 câu này với 1. Diwali/ of/ festival/ five-day/ celebrated/ across/ lighs/ is/ the/ by/ millions/ Hindu/ the/ world/ of. 2. house/ celebrate/ are/ candles/ decorated/ with/ to/ colourful/ Diwali/ and/ light.
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TÍNH. {[14:(-2)]+7}:2012 TÌM X BIẾT 3x-5=-7-13 |x|-10=-3
Anh chị nào giúp em giải 1hoặc 2 bài đi
III. Rewrite sentences by combining two sentences into one sentence and using suggested clues: 1. The air is so dirty. I sneeze so much. CONDITIONAL SENTENCE TYPE 2 ________________________________________________________________________________ 2. Their children have birth defects. The parents were exposed to radiation. BECAUSE ________________________________________________________________________________ 3. The air pollution causes breathing problems. LEADS IV. Choose the answer. 1-Lan is……..beautiful……..clever. a-so / that b-enough / to c-both / and 2-What do you intend………..? a-to buy b-bought c-buying 3-My grandfather stopped………..cigarette. a-to smoke b-smoked c-smoking 4-Tim is old enough……….with machines. a-work b-working c-to work 5-I wish I…………play football like Ronaldo. a-can b-could c-am able to 6-How many people took part……….the contest. a-at b-in c-on 7-The village…………….noisy. a-is become b-is becoming c-are becoming 8-She told me……..these books to her house. a-to take b-take c-taking 9-Mary is looking………her school bag. a-for b-of c-with 10-Susan has worked for that company………..4 years. a-Since b-during c-for V. Write the correct of each verb in the brackets to complete the following sentences. 1. We all adored (1.do)_____ aerobics when we were young. 2. 30 years ago, we (2.not have)________ mobile phone. 3. The girl (3.cry)_____ when a fairy (4.appear)______. VI. Rewrite or combine the sentences, using the suggested words. 1.Vinh really loves to hang out with his friends. => Vinh really enjoys……………………………………………………………… 2. Playing beach games is very interesting. => It is…………………………………………………………………………… 3. Most ethnic peoples in Vietnam speak their own languagues( Make question) =>…………………………………………………………. 4. The girl worked hard. Her step mother wasn’t happy ( use Although) =>………………………………………………………………..…..
Ai giúp em giải với ạ,em cảm ơn!!! Tính tổng : A : 1-2+3-4+5-...-2004+2005-2006 B : 1-3+5-7+9-...+2001-2003 C : 2-4+6-8+...+2008-2010
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