If x2 − 8xy + 12y2 = 8 and x − 6y = 3, then x − 2y =
a) 18
b) 24
c) 36
d) 8 3

(5x-1)^2= (5x)^2-2(5x)×1+(1)^2=25x^2-10x+1

85.3-64 = 21.3

so laura has already added 85.3 grams of chocolate powder and she has gone over the amount specified in the recipe by 21.3 grams

hope i ! have a great  day!

dont't really have enough info here but its likely

sss for the three sides being congruent ( its stands for side side side)

or

sas   for side angle side.   so a side is congruent and and angle and a side