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Published byLeona Norton Modified over 9 years ago
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Test Answers 1.B 2.D 3.A 4.C 5.49 6.C 7.D 8.B 9.40 feet 10.10 boys 11.e $570 u $395 12.(0, 2) 13.(-4, 0) 14.y = 2x + 3 15.D 16. 17. 18. 19.C 20.D
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Zero and Negative Exponents
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Raising a Number to the Zero Power Anything raised to the zero power is 1, except 0 to the zero power. 0 to the zero power is undefined. I’ll explain why later.
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Negative Exponents A negative exponent is telling you to find the reciprocal of that number, then raise it to the power indicated. For example, 5 -2 is telling you to flip 5 2 ( ), then square the 5( ). In the case of variables, you can just move it from top (numerator) to bottom (denominator) or vice versa. For example, would change to
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Examples 1.5 0 2.-3 0 3.(-6) 0 4.3 -2 5. 1.1 2.-1 3.1 4.1/9 5.9/4 6.5 5 10 0
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More Examples 5ac -5 ¼ 3/(7ab 5 c 2 d 4 ) 6/(ac 3 ) 5a/c 5
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Try these… 1. A square foot is 3 –2 square yards. Simplify this expression. Simplify. 2. 2 –6 3. (–7) –3 4. 6 0 5. –11 2 1 –121
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Try these… Evaluate each expression for the given value(s) of the variables(s). 6. x –4 for x =10 7. for a = 6 and b = 3 Simplify the following. There should be no negative exponents. 8. 9.
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