Simplify complex numbers

(-4+7i)+(-3-8i)

What is the vertical asymptotes of the function f(x)=x-2/x*2-3x-4

Four congruent circular holes with a diameter of 2 in. were punches out of a piece of paper. what is the area of the paper that is left ? use 3.14 for pi

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?