The way to answer this problem given different points and different equations in the choices is to do substitution and trial and error. In this regard, we substitute for example 4 to x in the equations and check which of them yields 89. The answer is D.
B because k is not a specified number
Alrite, so their change is just their difference, namely 32 1/4 - 20 5/6.
let's change those to "improper" fractions first.
