Estimate 1189-597. Show your working.

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

At $1.32 million, they closed last month percent above what they paid in 2007." how much did they pay in 2007?

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?