Let p = {x ∈ rn : ax = b, x ≥ 0} be a nonempty polyhedron, and let m be the dimension of the vector b. we call xj a null variable if xj = 0 for all x ∈ p. suppose there exists some p ∈ rm for which p′a ≥ 0, p′b = 0, and such that the jth component of p′a is positive. prove that xj is a null variable.

eve and marks ratios are equivalent

step-by-step explanation:

the highest percentage for deaths in construction from highest to lowest is as follows: falls, struck by objects, electrocution, and caught-in/between. these four are collectively known as fatal four.

in the case of falls, the type that is responsible for the overall highest death in the category is falls from roofs.

im pretty sure its

(8,15)

step-by-step explanation: