Answer:
578
Step-by-step explanation:
118 + 560 = 678
678 - 100 = 578
578 is your answer

Parallel lines share the same slope, so the slope of the parallel line in this case must be
.
Point-slope form is
, where
is the slope and
is any known point on the line.
Plug in the values. 
Simplify and distribute. 
Subtract 1 from both sides. 
Blinding is part of this, as the participants do not know whether they received the competitor's product.
Answer:
yes
Step-by-step explanation:
from sss axiom
we can say that they are congurqnt