Which chords are congruent? QP and SR QR and PR and RS PR and PS

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?