book Maths Puzzle Numerical Ability

Using the point slope formula, what is the equation of the line that passes through the points (1,5) and (0,0)? Please help me?

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how do I solve, everything in the parenthesis is raised to the -4th power

(-7a^2b^3c^0)^-4
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( 3a^3b^4c^3)
need help solving this problem:
A=18.98 B=3.3 C=2.28 solve for D

A + B x C >= D

thanks.