Use identities to find sin2θ and cos2θ, given cosθ= -12/15 and sinθ> 0 plz i need asap giving a lot of points for the one who solves this !

Y=4x^2+x-1 solve using quadratic formula

Rationalize the denominator- 12x/√x-10

The coordinate grid shows a pentagon. the pentagon is translated 3 units to the right and 5 units up to create a new pentagon. what is the rule for the location of the new pentagon?