Answer & Step-by-step explanation:
The formula is given in the middle. You are supposed to insert the value of x into this formula to find the value of y (like in the first given example):

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:Done
Answer: f(x) =(3x+5)^2
x= -5/3
Step-by-step explanation:
Answer: It just means 100 - 77% which equals to 23%.
Decreased means reduced or basically taking away a percentage of something. In this case it's numbers in math.
Hope this helps!
I think you isolate x. So make it be on one side of the sign