Answer:

Step-by-step explanation:
Given

Required
Simplify completely

Expand

Factorize the numerator

Divide the numerator and denominator by 2

Remove brackets

<em></em>
<em>The expression has been completely simplified</em>
draw in the line, here are the points
9. 200
10. 60
11. 60
12. 70
13. 2
14. -5
16. 2
(Just a PS, you should learn how to do this since it's basic algebra and will be used a lot in the future math classes that you take.)
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- Innverted
The kinetic energy of any moving object is
<u> KE = (1/2) (object's mass) (its speed)² </u>.
Both of those quantities are right there in your question.
Just write them into the KE formula.