Solve the equation log4 (x + 20) = 3

x=

DONE

x = 44

Step-by-step explanation:

log4 (x+20) = 3

4³ = x + 20

x + 20 = 64

x = 44

(Correct me if i am wrong)

Answer To The Whole Assignment

1. x = 44

2. x=7

3. (in order first box to last) 2,5,1,4,3

4. x = - 5

5. D. This number is a true solution of the original equation.

6. x=2

7. A. log2[x (x - 6) ] = 4

8. C. x2 - 6x - 16 = 0

9. x=8

10. x=1, x=2

11. There is no solution.

12. x=3 or x=-3

13. C. Only - 3 is an extraneous solution.

14. The bases of the logarithms are not the same. The one-to-one property does not apply when the bases are not the same. The change of base formula should have been used to write the logarithms with the same base.