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ljcervantes6610
08.09.2020 •
Mathematics
A group of people pays$720 for admission tickets to an amusement part. The price of an adult ticket is $15 and a child ticket is $8. There are 25 more adults than children. How many children are in the group?
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Ответ:
15
Step-by-step explanation:
Set the number of children to n.
The number of adults is, thus, n + 25.
The total price of admission is $720, made up of adult tickets and child tickets.
The children paid $8 per child, or
8 * n
The adults paid $15 per adult, or
15 * (n + 25)
These sum of these is equal to the total cost of $720.
8*n + 15*(n + 25) = 720
8n + 15(n + 25) = 720
Multiplying 15 with both n and 25.
8n + 15n + 25*15 = 720
8n + 15n + 375 = 720
Subtracting 375 from both sides.
8n + 15n + 375 - 375 = 720 - 375
8n + 15n = 345
Adding together 8n and 15n.
23n = 345
Dividing both sides by 23.
n = 345/23 = 15
n = 15
As n is the number of children, there are 15 children in the group.
15
Ответ:
85.2
Step-by-step explanation:
we can represent this in an equation where the initial value is going to be and to this we will subtract 2.6% of it
x - x * 2.6/100 = 83
x - 0.026x = 83
0.974x = 83
x = 83 / 0.974
x = 85.2156
we round to the nearest tenth and finally, we get that the result is 85.2