Which list contains only rational numbers?
2 answers:
Answer: Option A.
Step-by-step explanation:
Rationals numbers are defined as all those numbers which can be written as fractions, which have the form:
Being the numerator a and the denominator b integer numbers.
The numbers in the option A are rational numbers, because:
All these number can be written as fractions, therefore all of them are rational numbers.
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The solution of the equation is and
Explanation:
The equations are and
First we shall solve the equation graphically.
The image of the graph is attached below.
This contains the solution to the system of equations.
The equations and
are plotted on the graph.
The intersection of these two equations are the solutions of the system of equations.
Thus, the intersection of the two equations are and
Now, we shall solve the equation algebraically.
Let us solve the equation using substitution method.
Let us substitute in
, we get,
Adding both sides by 2x, we have,
Adding both sides by 2, we get,
Dividing both sides by 3,
Thus, the value of x is 3.
Substituting in
, we get,
Thus, the value of y is 1.
Hence, The solution of the equation is and
