exam Maths Puzzle Numerical Ability

write an equation of each line using the given information:
12. (-6,1),(-3,4)
10. m=-2/5,b=3

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exam Other Question

(25)^1/2-log5.2^1/2 Hello, Im from norway so i dont know what type of question this is:
This should be REALLY easy but i just cant remember what to do, hehe.
What is a+5? Because if a*5=5a, can a+5 be 5a?