Given the quadratic equation f(x) = -0.5x squared what is the value of f(35)

In the diagram below, tan θ = sqrt 3. what is the value of m?

Equation for the calculation double 2 and then add 5

It is given that the quadratic equation hx²-3x+k=0, where h and k are constants, has roots [tex] \beta \: and \: 2 \beta [/tex]express h in terms of k