Question

1. w is inversely proportional to the cube of x. Write this statement into an equation.

A. w = k/w^3
B. w = k/3w
C. w = 3k/w
D. w = 3kw

2. If x is proportional to y and inversely proportional to z, and x = 2 when y = 10 and z = 25. Which variation equation is shown in the equation?

A. x = y/z
B. x = ky/z
C. y = x/z
D. y = kx/z

3. If x is proportional to y and inversely proportional to z, and x = 2 when y = 10 and z = 25. What is the constant of the variation?

A. 5
B. 50
C. 20
D. 250

4. If x is proportional to y and inversely proportional to z, and x = 2 when y = 10 and z = 25. What is x when y = 8 and z = 32?

A. 5
B. 50
C. 20
D. 250

5. If x is proportional to y and inversely proportional to z, and x = 2 when y = 10 and z = 25. What kind of variation is this?

A. Direct
B. Inverse
C. Joint
D. Combined

6. Any expression raised to 0 is always equal to _____.

A. 0
B. 1
C. -1
D. undefined

7. Any expression divided by 0 is always equal to _____.

A. 0
B. 1
C. -1
D. undefined
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Answer 1

Answer:

1=A

2=B

3=A

4=not sure

Step-by-step explanation:

1) As it is inversely proportional to w it should be w=k/(w)^3

2) Directly proportional is x=ky and x=k/z

3) x=ky/z

so 2=k(10)/25

=25*2/10=k

k=5