Zhen and Justin made two different

number patterns that each started

at 0. Zhen wrote terms using the rule

"add 18." Justin wrote terms using the

rule "add 6." What is the relationship

between the two patterns?

Zhen pattern will be

Justin pattern will be

Since Zhen always add 18 and Justin always adds 6, and 6 is one third of 18, the n-th element of Zhen's pattern will always be three times the n-th element of Justin's pattern.

1 x=22.52

2: 65/39=604+39x

65x-39x=604

26x=604

x=604/26

×=23.23