Answer:
here this should help you understand.
Step-by-step explanation:
https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:quadratic-functions-equations/x2f8bb11595b61c86:completing-square-quadratics/v/completing-the-square-to-solve-quadratic-equations
Hello there i hope you are having a good day :) Your question : The cost of 12 oranges and 7 couples is 55.36. Eight oranges and apples cost $3.68. Find the cost of each : Firstly you would do oranges = O Apples = A. Then 12 oranges + 7 apples = 5.36 12o + 7A = 5.36 then you would take away from both sides so -12o Take away -12o = 7o = 5.36 - 12A now you would divide this by 7 so 7 cancels each out so you are left with 5.36/ 7 = 0.76 Then it would equal 0.76 - 12o/7 This would equal the amount of apples to be $0.76 each now for the oranges you would do the same that you work out for the apples.
Hopefully that help ya :)
Answer: D. (6, 9)
<u>Step-by-step explanation:</u>
Midpoint is the "average" of the x's and y's:
Given: (5, 13) and (7, 5)
Midpoint: 
= 
= (6, 9)
12/16=3/4, 3/4*8=6. Therefore Caitlin still has 6 km to go, So d=6
