Answer:
a = -40/3
Step-by-step explanation:
(7a - 4) = (4a - 44)
7a - 4 = 4a - 44
7a = 4a - 44 + 4
7a = 4a - 40
7a - 4a = - 40
3a = - 40
3a/3 = -40/3
a = -40/3 or -13.3333 repeating
A = lw (Area=length x width) 7x21= 147
The area is 147.
Yes it will be 3 since it gradually increases by 3
It’s the answer above sorry if this dindt help it might not be
Answer: First option is correct.
Step-by-step explanation:
Since we have given that
4.05, 1.35, 0.45, 0.15, ...
Since it is a geometric sequence.
So, here, a = 4.05
r = 
So, we know the formula for nth term in geometric sequence.

Hence, First option is correct.