Write an expression for the operation described below. add 4 and a

Jake bakes and sell apple pies. he sells each pie for $5.75 . the materials to make the pies cost $40. the boxes jake puts the pies in cost & 12.50 total. how many pies does jake need to sell to earn a profit of $50

Which is the focus of a parabola with equation y2=4x

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?