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giordanolucia18
31.10.2019 •
Mathematics
At a fast-food joint, 2 cheeseburgers and 3 medium shakes cost $8.98. at the same fast food joint, 7 cheeseburgers and 2 medium shakes cost $15.45. what is the cost of a cheeseburger? what is the cost of a medium shake?
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Ответ:
so first fast food joint gives 2x+3y=8.981
and nother one gives 7x+2y=15.452
multiply eq1 with 2
and multiply 3 to eq3
4x+6y=17.96
21x+6y=46.35
subtract both eq
-17x= - 28.39
cheese burger cost x=1.67 $ put x in eq1
medium shake cost y=1.88$
Ответ:
160°
Step-by-step explanation:
since it is a parallelogram it's opposite angles must be equal . So,
angle GHE = angle EFG
160 degree = angle EFG