HELP ASAP 25 POINTS If Jan can buy 12 copies of a certain book for $40, what is the unit rate for cost per copy? How much
would it cost her to buy 18 copies at the same rate?

What is the value of x enter your answer in the box (3x+50

What is the equation of the parabola with focus (-1,-1) and directrix y=1?

Which answer choice listed below is thewhich answer choice listed below is the inverse function of ƒ(x) = x-3 x+3 , x ≠ -3? a) ƒ-1(x) = 3 ( x+1 x-1 ), x ≠ 1 b) ƒ-1(x) = -3 ( x+1 x-1 ), x ≠ 1 c) ƒ-1(x) = 3 ( x-1 x+1 ), x ≠ -1 d) ƒ-1(x) = -3 ( x-1 x+1 ), x ≠ -1inverse function of ƒ(x) = x-3 x+3 , x ≠ -3?