Consider the propositional language with conjunction ∧, the biconditional ↔, and a 0-ary connective ⊥. That is, not only is each proposition symbol p a formula, but also ⊥ is a formula; and if φ and ψ are formulas, so are (φ∧ψ) and (φ ↔ ψ). The semantics of ⊥ is simply that ⊥ is always false, i. e., V (⊥) = 0 for any valuation V . To do: show that this language is truth-functionally complete. You may invoke any results that were already proved in the course lectures or homeworks.

What is the result of converting 60 ounces to pounds remember there are 16 ounces in a pound

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

In δabc shown below, ∠bac is congruent to ∠bca: triangle abc, where angles a and c are congruent given: base ∠bac and ∠acb are congruent. prove: δabc is an isosceles triangle. when completed (fill in the blanks), the following paragraph proves that line segment ab is congruent to line segment bc making δabc an isosceles triangle. (4 points) construct a perpendicular bisector from point b to line segment ac . label the point of intersection between this perpendicular bisector and line segment ac as point d: m∠bda and m∠bdc is 90° by the definition of a perpendicular bisector. ∠bda is congruent to ∠bdc by the definition of congruent angles. line segment ad is congruent to line segment dc by by the definition of a perpendicular bisector. δbad is congruent to δbcd by the line segment ab is congruent to line segment bc because consequently, δabc is isosceles by definition of an isosceles triangle. 1. corresponding parts of congruent triangles are congruent (cpctc) 2. the definition of a perpendicular bisector 1. the definition of a perpendicular bisector 2. the definition of congruent angles 1. the definition of congruent angles 2. the definition of a perpendicular bisector 1. angle-side-angle (asa) postulate 2. corresponding parts of congruent triangles are congruent (cpctc)