Home » Test Prep » PSAT Test » What is the value of x?
If xy = 2 and xy 2 = 8, what is the value of x?
A. 1/2
B. 2
C. 4
D. 8
E. 16
Correct Answer: A
Explanation/Reference:
Explanation:
Substituting xy = 2 into the equation xy2 = 8, you will obtain (xy)y = 2y = 8, thus y = 4. To find x, substitute y = 4 into one of the two original equations to obtain x = 1/2. The answer to this problem is (A).
Download Printable PDF. VALID exam to help you PASS.
|
|