Answer:
1.


2.

Step-by-step explanation:
Solving (1):
Given

Required
Determine the radius and circumference
Radius is calculated as follows:



The circumference is calculated using:



Solving (2):
Given

Assume that the window is circular, the perimeter is calculated as follows:



Step-by-step explanation:
3x-y= 1
bring 3x to the right so it become negative
-y= 1 - 3x
divide by -1 for each expression
y = -1 + 3x
arrange it by bring 3x to the front side
y = 3x-1
Answer:I think it’s 52
Step-by-step explanation:

P<6 is the solution
Be reminded <> change direction when you divide or multiply by a negative number.
Answer:
1.25 x 10^2 times greater.
or
125 times greater.
Step-by-step explanation:
The required ratio is 5 x 10^7 / 4 x 10^5
= 5/4 * (10^7 / 10^5)
= 1.25 x 10^2 greater.