lea buys 20 picture frames . some are 4 in .by 6 in.frames which costs 5.80 each and the rest are 5in. by 7in. frames that cost 9.60 each .she spends a total of 80.80 .

which eqauations models this soulaition?
let f represent the number of 4in.by 6in.flames she buys.

A.9.6f+5.8(20)=80.8
B.5.8f+9.6(20-f)=80.8
c.(5.8+9.6)(20-f)=80.8
d.6f+5.8(f+20)=80.8

Question

lea buys 20 picture frames . some are 4 in .by 6 in.frames which costs 5.80 each and the rest are 5in. by 7in. frames that cost 9.60 each .she spends a total of 80.80 .

which eqauations models this soulaition?
let f represent the number of 4in.by 6in.flames she buys.

A.9.6f+5.8(20)=80.8
B.5.8f+9.6(20-f)=80.8
c.(5.8+9.6)(20-f)=80.8
d.6f+5.8(f+20)=80.8

anonymous · Answer

when she buys f frames  for 5.80 each
total frames =20
she buys 20-f frames for 9.60 each
what is the total cost?