exam Maths Puzzle Numerical Ability

1) Simplify: (2x4y0 /z2)- 5

2) Simplify: (152x7y2 )/ (150x9y)

3) Write in scientific notation: 5,754,000,000

4) Perform the operation: (5x2 - 3x - 9) + (2x2 -

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exam Other Question
-4y = 4(5y + 6) Can someone please help me solve this problem?

3-a-4/a+3=a^2-2/a+3

Thank you.