practice a idea75
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Copyright by Holt, Rinehart and Winston. 1 Holt Algebra 2All rights reserved.
Name Date Class
LESSON
7-5Practice AExponential and Logarithmic Equations and Inequalities
Solve and check. The first one is done for you. 1. 4 2x 6 2. 8 2x 5 48 3. 4 x 2 20
log 4 2x log 6 log 8 2x 5 log 48 log 4 x 2 log 20
2x log 4 log 6 2x 5 log 8 log 48
2x log 6 _____ log 4 1.29
x 0.645
x 3.43
x 0.161
4. 3 5x 2 7 2x 1 5. 3 6 x 2 6 4x 6. 5 5x 6 50
x 3
x 2
x 1.686
Solve. 7. lo g 2 x 7 21 8. lo g 5 x 3 15 9. lo g 6 x 4 2 2
7lo g 2 x 21
lo g 2 x 3
x 8
x 3125
x 10 or x 2
10. log x log 9 3 11. log x log 4 1 12. log x 6 log 5x 2
9000 x
x 2.5
x 2
log10 x __ 9 3 10 3 x __ 9
1000 x __ 9
A2_IDEA_PA0705 1A2_IDEA_PA0705 1 4/11/06 4:14:31 PM4/11/06 4:14:31 PMProcess BlackProcess Black
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Copyright by Holt, Rinehart and Winston. 1 Holt Algebra 2All rights reserved.
Name Date Class
LESSON
7-5Practice AExponential and Logarithmic Equations and Inequalities
Solve and check. The first one is done for you. 1. 4 2x 6 2. 8 2x 5 48 3. 4 x 2 20
log 4 2x log 6 log 8 2x 5 log 48 log 4 x 2 log 20
2x log 4 log 6 2x 5 log 8 log 48
2x log 6 _____ log 4 1.29
x 0.645
x 3.43
x 0.161
4. 3 5x 2 7 2x 1 5. 3 6 x 2 6 4x 6. 5 5x 6 50
x 3
x 2
x 1.686
Solve. 7. lo g 2 x 7 21 8. lo g 5 x 3 15 9. lo g 6 x 4 2 2
7lo g 2 x 21
lo g 2 x 3
x 8
x 3125
x 10 or x 2
10. log x log 9 3 11. log x log 4 1 12. log x 6 log 5x 2
9000 x
x 2.5
x 2
log10 x __ 9 3 10 3 x __ 9
1000 x __ 9
A2_IDEA_PA0705 1A2_IDEA_PA0705 1 4/11/06 4:14:17 PM4/11/06 4:14:17 PM