Answer/Step-by-step Explanation:
4. Midpoint (M) of AB, for A(-2, -3) and B(1, 2) is given as:

Let 

Thus:


5. Given M(3, 5) as midpoint of CD, and C(-1, -1),
let 


Rewrite the equation to find the coordinates of D
and 
Solve for each:












Coordinates of D is (7, 11)
Answer: 143.81
Explanation:
Calculate the discounted price:
165.89 x 10.9/100 = 18.08$
Subtract the discounted price from the original price:
165.89 - 18.08 = 143.81$
143.81 is the price of their best oar’s sale on Leif Erickson day.
Answer:
40
Step-by-step explanation: