X=number of gallons that she must order.
4 gallons-----------------3 weeks
(7 gallons + x)--------12 weeks
We solve this rule of 3.
(7 gallons +x)3 weeks=4 gallons*12 weeks
21 gallons weeks+3 x weeks=48 gallons weeks
3x weeks=48 gallons weeks - 21 gallons weeks
3x weeks=27 gallons weeks
x=(27 gallons weeks) / 3 weeks=9 gallons.
Solution: she must order 9 gallons more.
Since each girl gets 11 sticker that means that there are 22 stickers in the pack.
11x2=22
Just mult. this monthly pay by 12 to obtain the annual salary:
12($1484.25) = $17775 per year (answer)
28 x 25 = $700
Answer: The class raises at least $700.
