exam Maths Puzzle Numerical Ability

Write the equation of the line that passes through the points (3,5) and (-1,10)

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exam Other Question

Find m and b so that (-3,4) is a solution of the system? HELP

a)solve 4x^2=12 I have to find x for this one
b)Find the intercepts of f(x)=4x^2-12

I am totally lost on this
Thanks