Answer:
C. SUBTRACT (2x) from both sides in the bottom equation
Step-by-step explanation:
Given
Required
The first step of a substitution method
In the second equation, notice that the coefficient of y is 1.
So, the first step is to make y the subject of the formula.
This is achieved by subtracting 2x from both sides of the equation.
<em>Hence: (c) is true</em>
<h2>y is 28.125 when x = 25</h2>
<em><u>Solution:</u></em>
Given that,
y is inversely proportional to the square root of x
Therefore,
----------- eqn 1
Where, c is constant of propotionality
y = 45 when x = 64
Substitute in eqn 1
What is y when x = 25?
Substitute x = 25 and c = 5.625 in eqn 1
Thus y is 28.125 when x = 25
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