Answer this question and get it right I will mark right one Brainliest I am thinking of a number from 1-10 what is it ?

Me find the missing dimension of a triangle height: 7 in., area: 21^2

Name the most appropriate metric unit for each measurement like the mass of cow

Apublic library wants to place 4 magazines and 9 books on each display shelf. the expression 4s+9s represents the total number of items that will be displayed on s shelves. simplify the expression