exam Maths Puzzle Numerical Ability

Write as an algebraic expression: two plus the product of 5 and m .
If you could tell me the answer and explain it. I would appreciate it. Thanks

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Divide.

m^8 n^6/m^4 n^2 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