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136 + ? = 255

Use the foil method to find (z− 5/3 )(z− 2/3 )

If the measure of xyz is 81 what is the measure of yz

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics