The Lewis family has 4 children. Sal is 1 year younger than his older brother Henry. Fatia is 2 years younger than Sal. Cheryl and Fatia are twins. If the sum of their ages is 25, how old is Cheryl?

Suppose that a households monthly water bill (in dollars) is a linear function of the amount of water the household uses (in hundreds of cubic feet, hcf). when graphed, the function gives a line with slope of 1.65. if the monthly cost for 13 hcf is $46.10 what is the monthly cost for 19 hcf?