In order to answer this problem, we need to add together similar terms. It is better to rearrange the terms so as to eliminate confusion and minimize the error in the calculation. There are three terms in the given equations, these are
a^3b
a^2b^2
and constant
therefore the answer is
-5a^3b - a^2b^2 +4
Answer:
Step-by-step explanation:
I say A
The radius of the cylinder is = 9
The ends of the rollers are surrounded by metal strip. The metal strip goes round the circle. That is the circumference of the circle.
C = 2πr = 2π*9 = 18π cm.
Length of metal sheet on one of the circle = 18π cm.
For the 3 rollers = 18π *3 = 54π cm. Using π ≈ 3.14
Length = 54π ≈ 54*3.14 ≈ 169.56 cm
Therefore length for the 3 metal strips = 54π ≈ 169.56 cm
Answer:
90,000 hours
Step-by-step explanation: