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gerardogonzale2294
08.02.2022 •
Mathematics
One group purchased 10 hotdogs and 5 drinks for $12.50. A second group bought 7 hot dogs and 4 drinks for $9.00. What is the cost of one hotdog? What is the cost of one drink?
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Ответ:
price of hotdog = $1
price of drink = $0.5
Step-by-step explanation:
let the price of hotdogs be x
let the price of drinks be y
10x + 5y = 12.50 1st eq
7x + 4y = 9 2nd eq
10x + 5y = 12.50 ×4
7x + 4y = 9 ×5
40x + 20y = 50
(-)35x + (-)20y = (-)45
5x = 5
x = 1
put the value of x in any of the prior eq.
(7)(1) + 4y = 9
4y = 9-7
y = 2/4
y = 1/2
price of hotdog = $1
price of drink = $0.5
Ответ:
Hi there!
Your answer is:
It costs 15$ for an 18 year old fan!
Step-by-step explanation:
This is due to the fact that the line y = 15 has a shaded in circle as an endpoint. When an endpoint is shaded, we know that THAT is the actual value.
Hope this helps!