Answer:
If y varies inversely as x, then we write it as:
y = k/x
where k is some constant.
If we multiply both sides of this equation by x we get an equation for k:
k = x*y
We are given that y=4 when x=7, therefore:
k = 7*4 = 28
Put this back into our original equation to get:
y = 28/x
Answer:
Step-by-step explanation:
Y=-2 for the problem
hope this helps
Answer :

step-by-step explanation :

This can be rewritten as:

Now,

The law of indices states that:

It implies that, when dividing two expressions with the same bases, repeat one of the bases and subtract the exponents.
Therefore,


Note: Any non-zero number exponent zero is 1
Also

Hence: