Sonny substituted 5 for x in the proportion 16/x =48/12 and cross multiplied to get 240 = 240. why is this?

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?

What is the remainder when 2872 is divided by 76? a) 51 b) 57 c) 60 d) 63

Find the number of liters in 12.8 gal of gasoline. round to the nearest hundredths