Answer:
0.8
Step-by-step explanation:
We begin with the expression: 
First, we need to convert the fractions into decimals to make this easier.
and 
Once we have this, we can simplify it

Answer:
a n = -3+(n-1)-30
Step-by-step explanation:
-3 - 30 = -33
-33 - 30 = -63
-63 - 30 = -93
The common difference here is -30. d = -30
The explicit formula is a n = a1 + (n-1)d
The factors of 4 are 1, 2, and 4 .
The factors of 9 are 1, 3, and 9 .
1. false because they have the same slope and y-intercept so they have infinite number of solutions
2. true