exam Maths Puzzle Numerical Ability

Evaluate.
Find (f+g)(-3) given f(x)=x-4 and g(x)=x-6

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exam Other Question

find the slope and the y-intercept of the line 6x-2y=7.
find an equation of each line in standard form satisfying the given conditions.
solve using the quadratic formula
this problem is taken from a homework sheet on quadratic equations, can you please show me the necessary steps involed in completing this problem.

x^2-3x-3=-5