Simplify -2.3f + 0.8f - 16 - 3

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

See attachment below and find the equivalent of tan(∠qsr)

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?