Предмет: Математика, автор: dididianaaaaaaaa

Срочно нужно. 20 баллов за помощь

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Ответы

Автор ответа: vanilla11sonia
0

Відповідь:

Покрокове пояснення:

4. (5,4-2¹/₃):7²/₃=0,4.

1) 5,4-2¹/₃=5²/₅=2¹/₃=27/5-7/3=(27*3-7*5)/15=(81-35)/15=46/15

2) 46/15:7²/₃=46/15:23/3=46*3/(15*23)=2/5=0,4.

5) (2¹/₃+0,25)*0,12=(7/3+1/4)*0,12=((7*4+1*3)/12)*0,12=((28+3)12)*-0,12-

(31/12)*(12/100)=31*12/(12*100)=31/100=0,31.

3) (7,6-4³/₄):1,9=(76/10-19/4):1,9=(38/5-19/4):1,9=((38*4-19*5)/20):1,9=

=((152-95)/20):1,9=57/20:19/10=57*10/(20*19)=3/2=1,5.

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In summer I (1 — go) to Brighton. When I (2 — arrive) there it (3 — be) late afternoon. After dinner I (4 — put) on my raincoat and (5 — go) out for a walk. It (6 — be) a nasty day, the sky (7 — cover) with clouds, and it (8 — rain) a little. As I (9 — move) slowly along the quiet empty street, I (10 — see) a stranger. He first (11 — pass) me by but then (12 — stop). "(13 — be) that you, Peter?" he (14 — cry) out. It (15 — be) Jones." I (16 — not see) you for ages," he (17 — say). — "Why, what you (18 — do) here?" I (19 — ask). "Why you (20 — not go) home?" — "I cannot," he (21 — answer). "I (22 — forget) the name of the hotel where my wife and I (23 — stay)." — "If you (24 — ring) up the hotels, you (25 — find) out where you (26 — stay)," I smiled. He said that he (27 — have) no money. And he (28 — explain) that they (29 — get) to Brighton at II o'clock. They (30 — leave) their things at the station and (31 — go) to a hotel. He (32 — change) his clothes and (33 — decide) to go for a walk. The sun (34 — shine) brightly and there (35 — be) nothing in the forecast about rain. I suggested that we (36 — go) to my hotel. While Jones (37 - take) a shower I (38- think) the situation over. Then we (39 — begin) telephoning all the hotels in Brighton. We (40 — do) it so well that next afternoon Jones (41 — find) both his hotel and his wife.