exam Maths Puzzle Numerical Ability

1) 8-a/b over 40/a

2) 2/5 - y/y-2

3) x/7 - 1/2 = x-11/2

4)x^2+6x-40/x^2-100

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exam Other Question

Can someone help me on this problem?

I need to know which property of the real numbers is illustrated by the following statement?

7 + 8 = 8 + 7

Thanks,
Sher Graph the quadratic equation after completing the given table of values

y=x^2-5x+4

x y
0
1
2
3
4