Rise over run change in y/change in x
The equation you use is (x – h)2 + (y – k)2 = r 2, r being the radius & h being the center hopefully this helps?
Answer
Find out the what is the effective cost per year of the extended warranty .
To proof
As given
The extended warranty on a $960 dishwasher is 21% of the purchase price and lasts for eight years.
21% is written in the decimal form

= 0.21
effective cost for the extended warranty = 0.21 × 960
= $ 201.6

= $25.2
Therefore the
effective cost per year of the extended warranty be $25.2
Option (d) is correct .
Hence proved
Answer:
x= 23.0 (nearest tenth)
Step-by-step explanation:
Please see the attached picture for the full solution.
Since the two trapezoids are similar, you could solve by doing a proportion: 12/20=X/25
You should end up with an answer of 15 (B)