PLEASE I NEED THIS NO which of the following equations is equivalent to y= - 1/2x^2 + 4 x + c (1/2 is a fraction )
a. y= -1/2 (x+4)^2+ c - 8
b. y= -1/2 (x+2)^2+ c - 16
c. y= -1/2 (x-4)^2+ c + 4
d. y= -1/2 (x-4)^2+ c+ 8

Me. i need an answer asap. , you! select the correct answer from each drop-down menu.simplify the given polynomial and use it to complete the statement.the polynomial simplifies to an expression that is a blank with a blank degree of blank .

The parabola x = y² - 9 opens: a.)up b.)down c.) right d.)left

In the following diagram it is given that dec,ab || dc, ad || eb, and ad is congruent to bc. a)why isn't abc a parallelogram even though it has a pair of parallel sides and a pair of congruent sides b)explain why be must be congruent to bc. further explain what type of triangle this makes triangle abc and what it tells you about angle 1 and angle 2c) finally why must angle 3 be congruent to angle 1? further, explain why we know that angle 3 is congruent to angle 2