These are sample practice MCQs created for exam preparation. These are NOT official exam questions.
If 3^x = 243 and 5^y = 125, what is x - y?
Question:
If 3^x = 243 and 5^y = 125, what is x - y?
If 3^x = 243 and 5^y = 125, what is x - y?
Options
Answer: (C) 2
Explanation:
3^x = 243 = 3^5, so x = 5. 5^y = 125 = 5^3, so y = 3. Therefore x - y = 5 - 3 = 2.
Explanation:
3^x = 243 = 3^5, so x = 5. 5^y = 125 = 5^3, so y = 3. Therefore x - y = 5 - 3 = 2.
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