exam Maths Puzzle Numerical Ability

tan(pi/6 + pi/4)

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exam Other Question

Find an equation for line with y-intercept 3 that is perpendicular to the line y=(2/3)x-4.
posible answer

a.2y=6-3x
b.2y=3x+6
c.3y+9- 2x
d.3y=2x+9

2.fahrenheit an celcius How many real solutions does this equation have?
(x^2-9x+19)^(2x^3-x^2-10x)=1