Which is the inverse of the function f(x)=4x-9

= .

Step-by-step explanation:

Given : f(x)=4x-9.

To find : Which is the inverse of the function.

Solution : We have given f(x)=4x-9.

Step 1 : replace y to x

x = 4y -9.

Step 2: solve for y

On adding by 9 both side

x + 9 = 4y

On dividing by 4 both sides

y = .

y = .

Then = .

Therefore, = .

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answer: d.) the total number of protons and neutrons is 15

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