exam Maths Puzzle Numerical Ability

Can you help me with this: h(x)= x squared plus 6x
h(x + 1) - h(x)=

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exam Other Question

please help to graph :

3x - 4y > or equal to 12

2x + y < 1
determine whether each equation defines y as a function of x....
A. 2x+y=8
B. 3x^2+y=14