exam Maths Puzzle Numerical Ability

the graph of y=f(x). graph each of the following
y=absolutevalue(f(x))
y=-f(x)
y=f(-x)
y=f(x+1)+1

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exam Other Question

if T=a+(n-1)d find t when a=16 n=11 and d=6
find t when a=20 n=6 and d=-2

please help me im stuck!!!
I need help solving the following equation:
x squared + 4x + 23 under the radical followed by +1=x