Answer:
10/7
Step-by-step explanation:
5 4/7=39/7
x+39/7=7
x=7-39/7
x=49/7-39/7
x=10/7
Step-by-step explanation:
A1=8
A2=A1+5 plug 8 into A1 here. After getting the value, put into next equation. And repeat until you get A5
A3=A2+5
A4=A3+5
A5=A4+5
Answer:
2nd option
Step-by-step explanation:
- 5 =
← in the form 
Because α varies directley to β

(k = constant)
α=7 when β=2
7= 2k
k=
so when α=21
21=

b
b= 6