A number increased by negative fifteen is less than twenty eight

Solve the system of equations. y= 2x y= x^2 - 15

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?

Afamily went out to dinner and their bill was $113.if they want to leave a 19% tip, how much should they leave.