x/15=4/5 x= 15*4/5 x = 12
2/x=6/7 x= 2/ (6/7) x =2*7/6 x=7/3 x= 2 1/3
8/9=x/27 x=27*8/9 x=24
10/23 = 4/x x=4/(10/23) x=4*(23/10) x=92/10 x=9.2
a little monkey was sitting on a tree. she was bored and she wanted to eat. she got down the tree and looked through the jungle to find a banana of a mango. but there was no fruits and even no tasty leafs. she was upset. she wandered through the jungle and meet her friends - green crocodile and bright parrot. parrot was very hungry too because he also couldn't find anything to eat. they decided to walk together. in a minute they noticed a huge yelow banana lying on the floor. monkey clutched it and at once many hunters with guns run to the glade.
friends started to run away. they ran through the bush and high grass and they saved their lives from the crafty hunters
Меньшая сторона площаки 9м
Большая сторона 12м.
Количество упаковок 6шт.
Пошаговое объяснение:
Пусть длина прямольника будет х м., тогда ширина прямоугольника будет (х+3) м.
Площадь прямоугольника равна произведению длины на ширину.
Составляем уравнение
х(х+3)=108
х²+3х-108=0
D=b²-4ac=9+4*108=441
x1;2=(-b±√D)/2a=(-3±21)/2
Из данных корней берем только положительный.
х=(-3+21)/2=18/2=9м длина.
9+3=12м ширина.
Периметр прямоугольника равен сумме всех сторон.
Р=2(9+12)=2*21=42м периметр прямоугольника.
42/8≈6 упаковок, (округление в большую сторону)
1)Х/15=4/5
5x=60
x=12
2)2/Х=6/7
6x=14
x=7/3
3)8/9=Х/27
9x=27*8
x=24
4)10/23=4/Х
10x=92
x=46/5