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eboneecook8704
01.02.2021 •
Mathematics
A farmer notes that in a field full of horses and geese there are 36 heads and 106 feet. How many of each animal are there?
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Ответ:
17 horses and 19 geese
Step-by-step explanation:
Let x be the number of horses and y be the number of geese
We know that, horses have four feet and geese have 2 feet
It is given that
x+y=36 (i)
and
4x+2y=106 (ii)
Solve the two equations simultaneously by substitution,
From equation (i)
y=36-x (iii)
Substitute y with 36-x in equation (ii)
4x+2(36-x)=106
4x+72-2x=106
4x-2x=106-72
2x=34
x=17
Then
Substitute x=17 to equation (iii)
y=36-17=19
x=17, y=19
We therefore have 17 horses and 19 geese
Ответ:
sin x° = opposite ÷ hypotenuse
Step-by-step explanation:
Recall the mnemonics SOHCAHTOA,
The meaning is as follows;
SOH
↓
CAH
↓
TOA
↓
Therefore the last choice is correct.