Kelseyzim
05.05.2020 •
Mathematics
What is
1+1=2
I have no idea ;)
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Ответ:
true
Step-by-step explanation:
Ответ:
o m that s har i thin 2
Step-by-step explanation:
hope this helps :) !
Ответ:
No of child =4
No of adult = 21
Step-by-step explanation:
Given:
Total People = 25
Child's dinner cost = $5
Adult's dinner cost = $22
Total Cost of party = $431
To Find:
No of Children = ?
No of Adults = ?
Solution:
Let x be the number of children and y be the number of adults
According to firs condition
total people = 25
so it becomes
x + y = 25 ...............(i)
From second condition
Total cost = cost of child + cost of adults
431 = 5 x + 22 y ..............(ii)
From equation (i) we have
x = y-25 ..............(iii)
Putting this value in equation (ii)
we get
431 = 5(y-25) + 22y
431 = 5y - 125 + 22y
it becomes
431 = 27y - 125
adding 125 on both sides
431 + 125 = 27y - 125 + 125
556 = 27y
it can be written as
27 y = 556
dividing both sides by 27
y = 20.59
As no of persons can not be 20.59
so rounding off gives
y = 21
Now for x
we have equation (iii)
which is
x = 25-y
x = 25 - 21
x = 4
No of child =4
No of adult = 21