book Maths Puzzle Numerical Ability

what is slope incerpt form?
how do I simplify square roots like 12sqrt + 12sqrt?

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book Other Question

#36 L has y-intercept (0,-3) and is parallel to the line with equation y=2/3x+1

#40 L has y-intercept (0,2) and is perpendicular to the line with equation 2x-3y=6

#52 In pla What is the length of Arc XY if Q is the center and angle XQY is 60 degrees. The diameter is 8 degrees. You dont have to give me the answer but if you could explain how to figure out these types of problems it would help alot. Thank-you.