mary is 3 years older than sarah. winifred is twice as old as mary. altogether their ages total 89. how old is sarah?

Which of the following shows the length of the third side, in inches, of the triangle below

Delbert keeps track of total of the total number of points he earns on homework assignments, each of which is worth 60 points. at the end of the semester he has 810 points. write an equation for delbert’s average homework score a in terms of the number of assignments n.

Atown has a population of 17000 and grows at 2.5% every year. to the nearest year, how long will it be until the population will reach 19600?