exam Maths Puzzle Numerical Ability

My economic class is quite challenging. Here is a question regarding the CPI.

Stanbon, does this make it any clearer? Thank you for your patience.



I(t) = - 0.2t ^ + 3

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exam Other Question
Can someone please help me figure this out?



Find two consecutive positive integers such that the sum of their squares is 85. f(x)=a
f(a)=3(a)+7

and f(x)= 5x-8
find all x and y intercepts.

Can you show me step by step please thank you.