exam Maths Puzzle Numerical Ability

Given f(x) = -2x -4, find f(-3).

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exam Other Question

Graph the equations
a=y=-7
b=x=-5
Show how you got the answer. Any and all assistance in this matter is greatly appreciated in advance. A quadratic function has x-intercepts at (-8,0) and (2,0). What is the transformational form of the function if the minimum y value is -3?
a) y=3/25(x+3)^2-3
b) 25/3(y+3)=(x+3)^2
c) 25/3(y-3)=(x-3)^2
d) 3/25(y-3)=(x-3)^2