To make a costume, rachel uses 6 yards of material and 3 yards of trim. suppose she uses a total of 48 yards to make several costumes. how many yards of trim does she use. write the rule you used to find the number of yards of trim.

We know that

To make a costume,
if Rachel uses 6 yards of material and>  3 yards of trim.
for 48 yards of material> X?
X=48*3/6> X=24 yards of trim

Let
a> [yards of trim for several costumes]
b> [yards of material for several costumes]
c> [yards of trim for one costume]
d>[yards of material for one costume]
the rule is> a=b*c/d

the answer is
24 yards of trim