exam Maths Puzzle Numerical Ability

Evaluate without a calculator
1. sec(210 degrees)

2. tan(-pi/4)

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exam Other Question

Can someone help me on this equation?

I need to complete the ordered pair so that each is a solution for the given equation:

3x + 4y = 12

pair 1 is= (,3/4)
pair 2 is= (,0)

Thanks,
Sher I need hel with the following question:

SOLVE FOR X:

e^(x^2)=e^(3x)* (1/e^2)