HELP PLEASE
solve the right triangle

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

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

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?