“To find the scale factor, we simply create a ratio of the lengths of two corresponding sides of two polygons. If the ratio is the same for all corresponding sides, then this is called the scale factor and the polygons are similar.”
Answer:

Step-by-step explanation:
Given

Required
Simpify
The very first step is to take LCM of the given expression

Perform arithmetic operations o the numerator

Divide the numerator and denominator by 2


The expression can't be further simplified;
Hence,
= 
Length of circular track is:
L = 2*r*pi
He run 3/4 of it so length is:
L' = 3*2/4*r*pi = 3/2*r*pi
To calculate speed of his movement we use formula:
v = s/t where s = L' and t = 1 minute 45 seconds = 105 seconds
v = L'/t = 3*r*pi/2*105
v = r* pi/70
If we take that r = 1
answer
Answer:
+ 12
Step-by-step explanation:
8 - (- 4) = 8 + 4 = 12
Answer:
p = 3
Step-by-step explanation:
This is an isosceles right triangle
=> 2side^2 = (hypotenuse)^2
=> 2p^2 = (3sqrt(2))^2
=> 2p^2 = 18
=> p^2 = 9
=> p = 3