Exponential functions:

6. log x + - 3log(x+4) 7. ln(x2 – 9) – ln (x - 3) + ln(x) Rewrite as a sum or difference of logarithms. 8. log 9. ln (3. 10. Solve by addition. 11. Solve by substitution. 12. Solve. x + 2y = 6 2x2 – y = 8 2x2 – y2 = 1. 2x - y = -8 y = -7x – 4 x2 – 2y2 = -1. Graph: 13. x2 + y2 > 9 14a. x + 2y 14b. ................
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