For problems 1–4, solve the given system of equations using either substitution or elimination.

This is so hard and it’s for a test

Will give brainliest b. describe the function over each part of its domain. state whether it is constant, increasing, or decreasing, and state the slope over each part.

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20