Answer:
15,17,19
Step-by-step explanation:
Make an equation : 
Solve the equation:



Since x=15 then the second number is 17 and then 19
Hope this helps!
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F(x) = 5(x + 4) – 80
f(x) = 5(x + 8) – 80
f(x) = 5(x + 4)2 – 80
f(x) = 5(x + 8)2 – 80
3=y and 2=x
Pretty sure that’s right