If you mean 9k-7 then you have to divide if not then I don’t really get the question lol
Answer: 
Step-by-step explanation:
1. You know that the high-speed camera is ready to film him between 15 meters and 10 meters above the ground.
2. The problem gives you the following equation:
3. Therefore, you must calculate the time when 
and when 
, as following:
4. Therefore, the answer is:
Answer: Parallel to the base.
Step-by-step explanation:
1. By definition a cross section is the intersection of a plane and a body of three dimensions.
2. As you can see inf the figure attached in the problem, the square cross section does not touch the base of the cake, then, by definition the slice that created the square cross section on the cake is parallel to the base of the cake.
3. Therefore, the answer is the third option.
Answer:
c^3 + c^2 - 7c + 20
Step-by-step explanation:
First, expand the expression using distributive property.
c^2(c+4) - 3c(c+4) + 5(c+4)
c^3 + 4c^2 - 3c^2 - 12c + 5c + 20
Lastly, simplify like terms.
c^3 + c^2 - 7c + 20
