It's all on the picture ​

y = 54

Step-by-step explanation:

45 = y - 9

 +9     +9

54 = y

y= 54            

(f - g)(x) = 5x^3 - 3

step-by-step explanation:

rearrange these functions vertically, with like terms in separate columns:

f(x) = 5x^3 - 2

g(x) =         +1

now subtract, column by column:

(f - g)(x) = 5x^3 - 3

answer: x=60