ISEE Mathematics Achievement Question 314: Answer and Explanation

Home > ISEE Test > ISEE Mathematics Achievement Practice Tests

Test Information

Use your browser's back button to return to your test results.
Do more ISEE Mathematics Achievement Practice Tests.

Question: 314

14. x^a = (x³)³

y^b =

What is the value of a × b ?

A. 17
B. 30
C. 48
D. 72

Correct Answer: D

Explanation:

D Use MADSPM to simplify the exponents in the equations first. When raising a power to a power, multiply the exponents together. For the first equation, (x³)³ = x^3×3 = x⁹, so a = 9. When dividing by the same base, subtract the exponents. For the second equation, = y^10-2 = y⁸, so b = 8. The question asks to find a × b, so 9 × 8 = 72. The correct answer is (D).

Previous Next