exam Maths Puzzle Numerical Ability

Several values of the two functions f and g are listed in the following tables
x 4 5 6 7
f(x) 7 6 5 4


x 4 5 6 7
g(x) 6 7 4 5

find (f*g) (6

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exam Other Question
hi, i am needing help with this question from a hand out..

f:R to R is defined by f(x)=2x+1 then f^-1=


i came up with 2x-1 as my answer..can you help verify? thanks Can someone help me solve for rate and round to the nearest tenth percent as needed? I know that rate= portion/base.

1. -----of 80 is 50

2.0.9 is-----of 2.25

Thanks