2nd Periodical Exam Reviewer MATH 9

Which of the following situations represents an inverse variation?

• A. The cost of gasoline, which corresponds to the number of liters.

• B. The number of persons working to the length of time in finishing the work.

• C. The weight of a person compared to his age.

• D. The income an employee receives compared to the length of time he works.

Determine the kind of variation that exists in the given equation where "k" is the constant variation. The volume (V) of a rectangular prism whose base with the length (I) and width (W):

• A. Direct

• B. Inverse

• C. Combined

• D. Joint

Determine the kind of variation being described in the given situation. The number of persons working compared to the number of days in doing the work, and the amount of work done.

• A. Joint

• B. Combined

• C. Inverse

• D. Direct

The given equation I=kprt is translated as:

• A. I varies directly as p, r and t

• B. I varies inversely as p and r

• C. I varies jointly as p, r and t

• D. I varies directly as r and inversely as p.

Which of the following graphs represents the given equation y=kx.

• 
• 
• 
• 

Write a^1/2a^2/6a^1/6 into expression with the single rational exponent.

• A. a^6/6

• B. a^6/24

• C. a^4/24

• D. a

Which of the following laws represent this expression a⁴ * a⁴ ?

• A. a^m * aⁿ = a^m+n

• B. (a^m )ⁿ = a^mn

• C. a^m / aⁿ = a^m-n

• D. (ab)^m = a^m b^m

Which of the following is the simplest form of the expression (5x^-4y⁰)^-1?

•   x⁴/5

• 5/x⁴

• 5x⁴  

• 5x⁴/y

Evaluate [(b^x)^y]^zif x = 1, y=2 and z = -1

• 1/b²

• b²

• b^-2

• 1/b

Using the expression (7a^1/2b⁴ )ⁿ, what should be the value of n so that the expression will be equal to 1?

• 1/2

• -1

• 1

• 0