Answer:
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Step-by-step explanation:
This is a ratio problem
6 / 800 = 9 / n (can say as 6 is to 800g as 9 is to n grams)
6n = 800(9) --- by multiplying means and extremes
n = 7200 / 6 divide by 6 to isolate n
n = 1200g
plug in to check 6 / 800 = 0.0075 9 / 1200 = 0.0075
First, you would divide 65 by 2 and you would get 32.5. Then, You would subtract 32 from 40 to get 8. Finally you would subtract 8 by 1995 to get your answer for what year was john exactly half his fathers age and that year would be 1987. Your welcome :)