exam Maths Puzzle Numerical Ability

i need help with the problems below... if f(x)= 3x-4 and g(x)= x=2
1. f-g 2. f*g

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exam Other Question

Given the line 2x - 5y = -10 and the parabola y = x(squared)-4x - 5

Find the distance between the y-intercept of the line and the vertex of the parabola. Write an equation of a line that passes through the x-intercept 4 with a slope of 2.