What is−1/2−(−5/9) as a fraction in simplest form

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

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day