Câu b bài 4 ý ak Giụp vs ạ Hứa đánh giá 5 sao

vẽ cho mình nhá tô màu bức dưới đây

(1/3x5+1/5x7+1/7x9+.....+1/19x21) x X =9/7

giúp mk bài 10 , 11, 12 , 13 với ạ !

Giúp mình bài này vs ạ Cần gấp ạ Cảm ơn ạ

tính nhanh:2x(1x13+1/3x5+1/5x7+......+1/13x15) trình bày ràng

99-97+95-93+...+57-55+53-51 GIẢI HỘ Ạ

Giúp mình giải từng bước cụ thể với các bạn ơi Mình cảm ơn

Giúp em với ạ hứa đánh giá 5 sao

Question 1: Put the verbs in brackets into the suitable tenses, including passives if necessary(12 points).The mystery of the Mary Celeste is one of the greatest mysteries of the sea. AnAmerican sailing ship, the Mary Celeste set sail from New York on 5 November 1872 - boundfor Genoa in Italy, with a cargo of 1,700 barrels of commercial alcohol.A month later - on 5 December - she (61 sight) .........................east of the Azores, in theeastern Atlantic, by a British ship, the Dei Gratia. By an amazing coincidence, the master ofthe British ship, Captain David Reed Morehouse, and the master of the Mary Celeste , captainBenjamine Spooner Briggs (62 dine) .......................together in New York the night before theMary Celeste (63 set sail) ......................So Morehouse (64 realize) ....................., that the MaryCeleste (65 sail) ......................in the wrong direction. What could be the ship doing, he (66wonder) ...................? Having hailed his friend's ship and got no reply, he (67go) ....................... to investigate. There (68 be) .........................nobody on board. CaptainBriggs, his wife and two-year-old daughter (69 all vanish) ...................... The last entry in theship's log was for 25 November, on which day the Mary Celeste (70 be) .................. within sixmiles of the Azores.An enquiry (71 hold later) ....................... in Gibraltar, but to this day the mystery of theMary Celeste ( 72 never solve) .................... .