How much greater is the greatest population than least population? how did you find it ?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

The ivring berlin learning center would like a possible net profit of $650,000 on its new resource manual it sells to schools. the fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. if the estimated unit sales are 1,250,000 units, what selling price unit should the ivring berlin learning center try?

2,10,-50 next two numbers geometric sequence