In nadias dvd collection she has 8 action dvds and 12 comedy dvds, romance dvds, and 3 science dvds what percent of nadias dvd collection are comedies?

answer: total cost earn=$1360

adult sold =45

student sold =80

adult cost twice as student cost so we can say adult sold 45+45=90

so total sold=90+80=170  

to get the cost of 1 meal we divide 1360 by 170

1360/170=8

one student meal cost=8$

one adult meal cost=8*2=16

total students meal cost=8*80=640$

total adult meal cost=16*45=720

640+720=1360

answer:

140 minutes (2 hours and 20 minutes)

step-by-step explanation:

the expression would be:

let x = kilograms

40x + 20

substitute our value in:

40(3) + 20

120 + 20

140 minutes