(3/8+2/3)+1/3 i have to put it in simplest form

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?

V=x^4-y^4 pick three expressions that can represent the three dimensions of the prism (each in meters)