hidagiser
28.07.2019 •
Mathematics
Israel and carlos were both eating at the same restaurant. israel bought 4 hamburgers and 2 orders of fries for $9.74. carlos bought 12 hamburgers and one order of fries for $22.77. if tashiana buys 3 hamburgers and one order of fries at the same restaurant, how much will be her total bill? a.) $6.66 b.) $6.47 c.) $5.66 d.) $5.37
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Ответ:
x-----------> cost of one hamburger
y-----------> cost of one order of fries
we know that
4x+2y=9.74--------------> equation 1
12x+y=22.77-----------> y=22.77-12x-----------> equation 2
using a graph tool---------> calculate the equations system
see the attached figure
the solution is
x=1.79
y=1.29
the cost of one hamburger is $1.79
the cost of one orders of fries is $1.29
If Tashiana buys 3 hamburgers and one order of fries
3*1.79+1.29---------> $6.66
the answer is $6.66
Ответ: