Christopher is 20 years younger than ishaan. ishaan and christopher first met 2 years ago. 14 years ago, ishaan was 3 times as old as christopher. how old is christopher now?

Which table represents a linear function? i'll give brainliest to first answer ^'^

Find the perimeter of the triangle with vertices  d(3, 4),  e(8, 7), and  f(5, 9). do not round before calculating the perimeter. after calculating the perimeter, round your answer to the nearest tenth.  

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.