If a litre of water is provided for 20 people, how much for 50 people?
2 answers:
Answer:
2.5 L
Step-by-step explanation:
We use a rule of three to solve this problem, the information we have is represented as follows:
Liters People
1 ⇒ 20
x ⇒ 50
x represents the unknown quantity, the liters that correspond to 50 people.
The way x is found is as follows: We multiply the cross quantities and divide by the remaining quantity.
Thus, for 50 people is provided 2.5 liters of water
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No, (2,2) is not solution of y < 4x - 6
Step-by-step explanation:
To solve above linear problem, we use standard method of Back- Substitution.
First of all, A point (2,2) only becomes solution of equation, if it satisfies equation .
Here, the seems to be like a linear equation.
In this Equation, using Back- Substitution method,
Point (2,2) : first digit 2 corresponds to x- coordinate and second digit 2 corresponds to y-coordinate.
By putting value of x and y in equation (1),
Equation becomes,
.... not true mathematically.
Finally, the result came is not true. Therefore, (2,2) is not solution for equation