Exponent and solving for variable

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Anonymous Anonymous
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Exponent and solving for variable

If 5 to the second power times 5r equals 225, what is r?
AlgebraHouse AlgebraHouse
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Re: Exponent and solving for variable

Anonymous wrote
If 5 to the second power times 5r equals 225, what is r?
5^2(5r) = 225
25(5r) = 225 {evaluated 5^2 to be 25}
125r = 225 {multiplied 35 by 5}
r = 1.8 {divided both sides by 125}

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