How are exponents related to taking the root of a number?

Which three lengths could be the lengths of the sides of a triangle? 21 cm, 7 cm, 7 cm 9 cm, 15 cm, 22 cm 13 cm, 5 cm, 18 cm 8 cm, 23 cm, 11 cm

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Y=21.95x+10 y=22.45x solve by substitution