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alexgonzales7133
24.06.2019 •
Mathematics
The parallelogram is reflected across the line y=x. which of the following are coordinates of a vertex of the image? -10 -9 -8 -7 -6 -5-o a'(1,-5)ob'(-3,-4)c'(-1,-2)o d'(1,3)
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Ответ:
$5
Step-by-step explanation:
Let the cost of one burger be $b while the cost of one small fries be s
2 burgers and 2 small fries cost $14
This means that;
2b + 2s = 14
divide both sides by 2
b + s = 7 •••••••• (i)
Three burgers and four small fries cost $23
Mathematically;
3b + 4s = 23 •••••••• (ii)
From i , we can see that s = 7- b
we can now substitute this into equation ii
3b + 4(7-b) = 23
3b + 28 -4b = 23
4b -3b = 28 -23
b = $5
one burger costs $5