SOLUTION: If 7-x = 1/4, what does 49^x equal

Algebra.Com
Question 1044129: If 7-x = 1/4, what does 49^x equal
Found 2 solutions by jim_thompson5910, MathLover1:
Answer by jim_thompson5910(35256)   (Show Source): You can put this solution on YOUR website!


I'm assuming you meant to write this equation . If so, then,





Rewrite with positive exponents


Flip both fractions (ie take the reciprocals)


Square both sides














The final answer is 16



Answer by MathLover1(20850)   (Show Source): You can put this solution on YOUR website!

, first solve for



than

RELATED QUESTIONS

If 7^-x = 1/4 , what does 49^x... (answered by solver91311)
If 7^-x= 1/4, what does 49x... (answered by HasanSahin)
If 7-x = 1/4 , what does 49x... (answered by fractalier)
4-7/4x=1/2 what does x equal... (answered by fcabanski)
1. If 6^x = 5, what does 6^-2x equal? 2. if 7^x=3, what does 7^-2x... (answered by ikleyn)
If f(x) = 7^x, then what does f(x+3)-f(x+1)... (answered by ikleyn)
3x-1= 4 what does x... (answered by tommyt3rd)
If 7-x = 1/4 , what does 49x equal? a. 4 b. 16 c. -16 d. -4 (answered by ikleyn)
If x^(2)+1/x^(2)=4, then what does x^(3)+1/x^(3)... (answered by RAY100)