Answer:
the anwer is B ( i mean second option)
And you can try it
you will find ;

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Step-by-step explanation:
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70% of 100 is 70
Hope I helped ♡
The answer to an addition problem is called a sum
Hope this helps!
Answer:
Option (a) is correct.
The system of equation becomes

Step-by-step explanation:
Given : Equation 
We have to construct a system of equations that can be used to find the roots of the equation 
Consider the given equation 
To construct a system of equation put both sides of the given equation equal to a same variable.
Let the variable be "y", Then the equation 
becomes,
Thus, The system of equation becomes

Option (a) is correct.