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needhelpwithHW10
30.07.2021 •
Physics
Chiếc ghế Bốn chân Có khối lượng 3 kg. Diện tích tiếp xúc với nền nhà của mỗi chân ghế là S1=8 Cm2 a)Tính áp suất của ghế tác dụng lên nền nhà. b) Nếu một người có khối lượng 50 kg ngồi trên ghế không chạm chân xuống đất. Tính áp suất của ghế tác dụng lên nền nhà trong trường hợp này
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Ответ:
Chiếc ghế Bốn chân Có khối lượng 3 kg. Diện tích tiếp xúc với nền nhà của mỗi chân ghế là S1=8 Cm2
a)Tính áp suất của ghế tác dụng lên nền nhà. b) Nếu một người có khối lượng 50 kg ngồi trên ghế không chạm chân xuống đất. Tính áp suất của ghế tác dụng lên nền nhà trong trường hợp này
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