Como resolver (+7).(-5)?

E favor responder com a expressao montada?
Obrigado!!!

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3

Which will form a composite function?

How do newtons third law of motion demonstrates on a rollar coster