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+show work PLEASE HELP!!

+show work PLEASE HELP!!-example-1
User Rolinh
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1 Answer

3 votes

Answer:

28. x=6 29. x=15 30. -56/5 31. -3 32. -10 33. 9.6

Explanation:

The statement "y varies inversely as x" means that there is a constant (a number that doesn't change) k so that


y=(k)/(x)

28. y = 12 when x = 3, so
12=(k)/(3) \Rightarrow k=(12)(3)=36. Now that you know the value of k (in THIS problem!), plug in 6 for y to find x.


6=(36)/(x)\\6x=36\\x=6

All these problems work the same way.

29.
5=(k)/(6) \Rightarrow 5(6)=k \Rightarrow k=30 Then,
2=(30)/(x) \Rightarrow 2x = 30 \Rightarrow x=15.

30.


4=(k)/(14) \Rightarrow (4)(14)=k \Rightarrow k=56\\-5=(56)/(x) \Rightarrow -5x=56 \Rightarrow x = -(56)/(5)

31.


9=(k)/(9) \Rightarrow 81=k\\\\y=(81)/(-27)=-3

User Karan Singh Dhir
by
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