exam Maths Puzzle Numerical Ability

1. Simplify 4x[(7x^2+2x-5)+(3x^2+9x)/3x]

2.Write down the coeficient of the term 4x^4y^2 in the algebraic expression 4x^4y^2z-3x^3y^2z+3/2xy^3z^2

3. Tom's uncle owns a triang

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exam Other Question
The average of two numbers is 7. Find the numbers if three times one of the numbers is one half the other number.



I can not figure ths out. I can not get it written into two equations. Can someone please help me with this problem:

If g(x) is an inverse of f(x), then how do the ordinate and abscissa coordinates of the points on f(x) map onto coordinates of g(x