Answer:
-y(7+y) =0
Step-by-step explanation:
-7y - y^2 = 0
Factor out a -y
-y(7+y) =0
Using the zero product property
-y =0 and 7+y =0
y=0 7-7+y = 0-7
y=0 y = -7
Easy peasy
400lb convert to oz
400 times 16=6400oz
6400/10=640
answer is 640 oz
C is answer
The answer to your question would be 4 miles an hour
350 dollars for the kayak + 1.50 for the fee + the 10.23 interest for the three months = 361.73