Fred can mow a lawn in 40 minutes. vanessa can mow the same lawn in 80 minutes. how long does it take for both fred and vanessa to mow the lawn if they are working together?

Pelle's sister is three years older than pelle the father is 5 times as old as pelle the mother was 28 when the sister was born altogether they are 98 years old how old is pelle?

Which expression is equivalent to 5r6141 2r+st6

Guys i really need or i have to stay late up night