Answer:
C
Step-by-step explanation:
C is the only choice where all given options have different or no coefficients.
Angle ECD is 118°, let me know if you need an explanation or just wanted the answer
we know that in direct variation as x increase y also increases.
in indirect variation x decreases y increase and vice versa.
in part a we have x at top (numerator ) and y at denominator it mean indirect variation (as x increases y decreases).
to find k we know that for indirect variation xy=k
if we rewrite the equation x=9/y we get xy=9
which mean k=9 .
in part b we have 4xy=20 if we simplify this equation we get

so here if we rewrite in terms of x.
we get x=5/y which represents indirect variation.
and we know xy=k
we have xy=5 .so k=5
Answer:
237.46 cm squared
Step-by-step explanation:
look at the image for explanation