I need help what is 3^{-2}

answer: the common difference is -0.10

$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.