A(n)=-6-4(n-1) find the 4th term in the sequence

The vertices of a triangle are a(7,5), b(4,2), c(9,2). what is m

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?

What is the area of the shaded sector?