половое размножение цветковых растений

5(1-х)>5x-(3x+2)

...

Once upon a time there (be)1 three Billy Goats Gruff. One day they (decide)2 (visit)3 their favorite hill. "I expect you (find)4 something good (eat)5 there," said the elder goat. Before they (can)6 (get)7 to the hill they (have to)8 (cross)9 a bridge. They (know)10 that a mean ugly troll (live)11 under the bridge but they never (see)12 him before. They also (know)13 that the troll (like)14 (fight)15. "If we (meet)16 the troll, I (fight)17 with him," said the younger goat. 
While the three goats (approach)18 the river the troll (sit)19 in the water (have)20 a wonderful time. Soon he (hear)21 the goats (come)22 onto the bridge. "Where you go?" asked the troll. "Who you (be)24?" The first goat who (cross)25 the river was the younger brother and he (become)26 afraid. He (not want)27 the troll (eat)28 him. So he (say)29 that he (be)30 small and thin. He (promise)31 the troll that the latter soon (see)32 his bigger brothers who (be)33 more dilicious. So the troll (let)34 the small goat (cross)35 the bridge. The troll (ask)36 to let the middle brother (cross)37 the bridge and he (allow)38 that as he (think)39 that the elder goat (be)40 the fattest. "I (live)41 under the bridge for many yearsbut I never (have)42 such a delicious meal," said the troll. But the elder goat was big and fat and strong. He (fight)43 and (win)44 many battles. When he (ask)45 (not move)46 he (come)47 closer to the troll and (give)48 him a big push. "I (not know)49 if I never (see)50 you again, Troll, but if I (do)51, (be)52 careful or I (kill)53 you." The troll (fall)54 into the river and nobody never (see)55 him again.

1)                                 -   площадь одной грани

2)                                -    длина ребра куба

3)                                 -      объём куба

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