Having trouble solving this

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?