vorequeen
18.07.2019 •
Mathematics
Me. i'll respect you forever! ( i'll give brainliest at the best) a) in a game, one gains 5 points for every won round and loses 3 points otherwise. after 20 rounds, mike had 68 points. how many round did he win? b) baby dragons have one head and two wings, adult dragons have 3 heads and four wings. in one dragon family, there are 25 heads and 36 wings. how many dragons are there in this family?
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Ответ:
There are 4 babies and 7 adults
B head=4x1=4 A heads=(3x7)=21 21+4=25 heads
B wings is 4x2=8 A is wings(4x7)=28 28+8=36 wings
Ответ:
Explanation:
Geometric mean: sqrt a • b
sqrt a • 15 = 9 sqrt 15
Sqrt 15a = 9 sqrt 15
(Sqrt 15a)^2 = (9 sqrt 15)^2
15a = 81 x 15
a = 81