Jessica and her 2 sisters want to take a camping trip. they have $225 saved. each of them will save $21 a week until they have at least $512 to pay for the trip. how much money will they save after 4 weeks? will they have enough money to pay for the trip? what are the hidden questions

393 dollups

no

21×2=42

42×4=168

168+225=393

there ya go dude

225 + 63n for n- a natural number,
set 512=225+63n to find total number of weeks
63=21*3
use n=4 to solve the amount saved in 4 weeks
they wont 60*4=240, 240+12, 252+225=477
how much are the saving a day
what do they need to put up to have enough in 4 weeks
how much a day do the need to save to go in 1 week
etc