If the circumference of a circle is changed from 9 cm to 3 cm, then the diameter decreases by a factor of 3.
Answer:
5 units
Step-by-step explanation:
You can use the distance formula or pythagorean theorem to solve this.
Original point A: (0,0)
New point B: (3, 4)
Distance formula: 
Plug the points in:
= 5
5 units
Rad15
use the pythagorean theorem on both triangles to find x
y^2 + 6^2 = 10^2
y=8
7^2 + x^2 = 8^2
x=radical 15
Answer:
x=1/4y
Step-by-step explanation:
Step 1: You flip the equation
4x=y
Step 2: Divide both sides by 4
4x/4 = y/4
x=1/4y