book Maths Puzzle Numerical Ability

Fill in the tables using the given formulas
y = 10x + 100
______________
_x_________y___
-20
_____________
-10
_____________
0
_____________
10
_____________

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book Other Question

How do I Solve the equation by first clearing the fractions
Here's the problem:
5/6s+2/9=-7/12
Why is it necessary for two rays to have the same endpoint in the definition of an angle?