a+b+c=68
b-3=a
c-5=b
now just solve the system of equations, substitue so that there are only b's in the equation:
a+b+c=68
(b-3) + b + (b+5) = 68
3b=66
b=22
Therefore Barbara is 22
She has 144-100=44. 44-4=40. Medium holds to beads you will need 4 medium boxes.
3: 18
4: 17
5: 561
6: 17
7: 23
:)
In cylindrical coordinates, we take



so that
.
We have

and the integral is

Answer:

Step-by-step explanation:
The correct solution of the given equation is as follows :
We have,

⇒ 
⇒ 
⇒ 
Comparing the power of equal base, we get
- 6 = 8a
⇒ 
⇒
Therefore, before equating the powers of two terms the base of the terms should be equal and here this is the error. (Answer)