Selma's class is making care packages to give to victims of a natural disaster. Selma packs one box in 5 minutes and has already

Question

3 years ago

6

Selma's class is making care packages to give to victims of a natural disaster. Selma packs one box in 5 minutes and has already

packed 12 boxes. Her friend Trudy packs one box in 7 minutes and has already packed 18 boxes. How many more minutes does each need to work in order to have packed the same number of boxes?

Mathematics

2 answers:

Monica [59] · Answer 1 · 2022-03-16T04:25:11+03:00

Monica [59]3 years ago

7 0

66 more min. he used which could be 1 hour and 6 min.

LUCKY_DIMON [66] · Answer 2 · 2022-03-16T06:38:38+03:00

LUCKY_DIMON [66]3 years ago

7 0

Selma Trudy

12 + x/5 = 18 + x/7 (x = amount of time, in minutes)

x/5 - x/7 = 18 - 12

7x/35-5x/35=6

35*6/2=105 minutes

%282x%29%2F35%29%29 = 6 ====> x = %2835%2A6%29%2F2 = 105 minutes.

Answer. 105 minutes, or 1 hour and 45 minutes.