Answer:

Step-by-step explanation:
=> 
Using the distributive property
=> 
From 72 to 90 it is a 25% change
Answer: 525 cycles per second.
Step-by-step explanation:
The equation for inverse variation between x and y is given by :-
(1)
Given : The length of a violin string varies inversely with the frequency of its vibrations.
A violin string 14 inches long vibrates at a frequency of 450 cycles per second.
Let x = length of a violin
y= frequency of its vibrations
To find: The frequency of a 12 inch violin string.
Put
in equation (1) , we get
Divide both sides by 12 , we get

Hence, the frequency of a 12 inch violin string = 525 cycles per second.
9} 3,1,9
18} 1,18,2,9,3,6
They both have 1,3,9
2 consecutive odd numbers : x and x + 2
is at most 116....
x + x + 2 < = 116
2x + 2 < = 116
2x < = 116 - 2
2x < = 114
x < = 114/2
x < = 57
x < = 59 ......greatest consecutive odd integer is 59