Area of square = where,
is the side length of the square.
s must be positive since it is a side length, so the negative root of 81 is rejected.
Perimeter=
Perimeter=
Mr. canton places 24 desks in 6 equal rows. how many is in each row?? is it 24 times 6
2 answers:
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Answer:
100 liters of 10% solution is used and 20 liters of 40% solution is used
Step-by-step explanation:
Let "X" amount of 10% solution is used. Then the amount of 40% solution used is equal to 120-X
Now
10% of X + 40% of (120-X) = 15% of 120
On solving the above equation, we get
liters
Amount of 40% solution used = 120 -X = 120-100 = 20 liters
100 liters of 10% solution is used and 20 liters of 40% solution is used