If 2 is added to five times a number the result is equal to 5 more than four times the number find the number

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

Write 5(6x+4)-2(5x-2) in the form a(bx+c) where a,b and c integers and a> 1

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)