exam Maths Puzzle Numerical Ability

Urgent please help!!!

-1+41log3(-3x)=7

Solve please!!!!

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exam Other Question

Verify the identy:


1+tan²x
------- =csc²x
tan²x
The lenght of a rectangle is fixed at 28 cm. What widths will make the perimeter greater than 100 cm?

The width must be greater than ? cm