perezesmeralda78
21.01.2021 •
Mathematics
Whats 6x + 7y - 5 when x = 2 and y = 3
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Ответ:
28
Step-by-step explanation:
Plug into equation
Ответ:
Height of a wall: h=8.3ft
Length of a wall: l
d²=h²+l², l²=d²-h², l=√(d²-h²)
l=√(43.6²-8.3²), l=42.8ft
Area of a wall is: l*h=8.3*42.8=355.24ft²
One spray can can cover 21.5ft². 355.24/21.5=16.52
John will need 17 cans of spray.