Q. Select all the expressions that are equivalent to 55×5−3.Multi-select Choices:(A) 5−151(B) 5−15(C) 5−21(D) 521
Use Exponent Properties: To solve this problem, we need to use the properties of exponents. Specifically, when multiplying two powers with the same base, we add the exponents.55×5−3=55+(−3)=52.
Compare with Choices: Now we need to compare the result 52 with each of the given choices to determine which are equivalent.(A) 5−151 is not equivalent because the negative exponent indicates the reciprocal, and the base and exponent do not match 52.
Analysis of Choices:(B)5−15 is not equivalent because the exponent −15 does not match the exponent 2 in 52.
Analysis of Choices: (B) 5−15 is not equivalent because the exponent −15 does not match the exponent 2 in 52. (C) 5−21 is equivalent because the negative exponent indicates the reciprocal, and when we take the reciprocal of 5−2, we get 52.
Analysis of Choices: (B) 5−15 is not equivalent because the exponent −15 does not match the exponent 2 in 52. (C) 5−21 is equivalent because the negative exponent indicates the reciprocal, and when we take the reciprocal of 5−2, we get 52. (D) 521 is equivalent because it is the reciprocal of 52, which is the same as 52.
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