exam Maths Puzzle Numerical Ability

If f(x) = 11x + 7 and g(x) = x^2 - 6x, find (f o g)(x)

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exam Other Question

Please help, I don't understand what they are asking
For the exponential function ex and logarithmic function log x, graphically show the effect if x is doubled. Find the standard form of the equation of the line with slope -2 and y-intercept -4.

Choices are:

8x+4y=-16

y=-2x+4

-8x-16y=4

4x+8y=-16