Will give brainliest and a hella lot of points

answer it with full descriptions and such if you can solve these questions u have big brain. good luck

I will only do Q.1

1 a. Sequence X_ is going up by 20

1 b. 8=116 and 13=236

1 c.  Sequence a_ is down up by 13

1 d.  12=39 and 15=0

Step-by-step explanation:

1 a.Sequence X_ is going up by 20

1 b. go from 56

6=56 +20=76

7=76 +20=96

8= 96+20=116

9=116+20=136

10=136+20=156

11=156+20=176

12=196+20=216

13=216+20=236

1 c. Sequence a_ is down up by 13

1 d. go from 78

10=78-13=65

11=65-13=52

12=52-13=39

13=39-13=26

14=26-13=13

15=13-13=0

I will only do Q.11 a. Sequence X_ is going up by 201 b. 8=116 and 13=2361 c.  Sequence a_ is down up by 131 d.  12=39 and 15=0Step-by-step explanation:1 a.Sequence X_ is going up by 201 b. go from 566=56 +20=767=76 +20=968= 96+20=1169=116+20=13610=136+20=15611=156+20=17612=196+20=21613=216+20=2361 c. Sequence a_ is down up by 131 d. go from 7810=78-13=6511=65-13=5212=52-13=3913=39-13=2614=26-13=1315=13-13=0

answer is 12345678900987654321234567890987654321

step-by-step explanation: