Answer:

Step-by-step explanation:
⇒ 
⇒ 
⇒ 
⇒ 
Answer:
3
Step-by-step explanation:
You have to plug in the numbers for x
Answer: 6
Step-by-step explanation:
Two negatives make a positive, -42/-7 would be 6. The same as a normal 42/7
Answer:
115
Step-by-step explanation:
There is a common difference d between consecutive terms, that is
d = 7 - 1 = 13 - 7 = 19 - 13 = 25 - 19 = 6
This indicates the sequence is arithmetic with n th term
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = 1 and d = 6 , thus
a₂₀ = 1 + (19 × 6) = 1 + 114 = 115