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cutie777
08.03.2020 •
Mathematics
Richard purchased air show tickets for 5 adults and 2 kids. The total cost is $167. The cost for a child is $4 less then the cost of an adult ticket. Find the price of an adult ticket and a child ticket
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Ответ:
an adult ticket costs $25 and a child ticket costs $21
Step-by-step explanation:
Let x represent the price of an adult ticket.
Let y represent the price of a child ticket.
Richard purchased air show tickets for 5 adults and 2 kids. The total cost is $167. This is expressed as
5x + 2y = 167- - - - - - - - - - -1
The cost for a child is $4 less then the cost of an adult ticket. This is expressed as
y = x - 4
Substituting y = x - 4 into equation 1, it becomes
5x + 2(x - 4) = 167
5x + 2x - 8 = 167
7x = 175
x = 175/7
x = 25
y = x - 4 = 25 - 4
y = 21
Ответ:
Approximately 7 deaths per minute.
Step-by-step explanation:
There's 365 days in a year, there's 24 hours in a day, and there's 60 minutes in one hour. 3.6 Million/ 365 days = 9,863 deaths per day 9,863 deaths per day/ 24 hours = 411 deaths per hour 411 deaths per hour/ 60 minutes = Approximately 7 deaths per minute