help me please i need this done

Answer:
[tex]7n-6, \: 4n+8[/tex]
Step-by-step explanation:
[tex]+7[/tex] difference.
So it becomes [tex]7n[/tex].
[tex]7(1)+c=1[/tex]
[tex]c=-6[/tex]
Therefore, the nth term becomes:
[tex]7n-6[/tex]
[tex]+4[/tex] difference.
So it becomes [tex]4n[/tex].
[tex]4(1)+c=12[/tex]
[tex]c=8[/tex]
Therefore, the nth term becomes:
[tex]4n+8[/tex]
Answer:
a) 7n-6
b) 4n+8
Explanation:
a) 7 times tables but take away 6 for the start
b) 4 times tables but add 8 for the start