book Maths Puzzle Numerical Ability

can you help me?
What is the equation of the line that passes through the points (-2,2) and (0,5) ?

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i need help on two problems if its possible!...

5-(square root 3x)=1

4x=1(all in sqaure root)=3

thanx
Trish could oyu give me the help and answers to finding the associative and commuuntative propety 125+347+75... 58+16+2+4...2(25+8)+2(15-8)... 6(40-21)-6(20-1)