A set of weights includes a 4 lb barbell and 6 pairs of weight plates. Each pair of plates weighs 20 lbs. If x pairs of pates are added to the barbell, the total weight of the barbell and plates in pounds can be represented by f(x)=20x+4. What is the domain and the rage of this function?

Select the correct answer. given: ∆abc with prove: statement reason 1. given 2. ∠cab ≅ ∠edb ∠acb ≅ ∠deb if two parallel lines are cut by a transversal, the corresponding angles are congruent. 3. ∆abc ~ ∆dbe aa criterion for similarity 4. corresponding sides of similar triangles are proportional. 5. ab = ad + db cb = ce + eb segment addition 6. substitution property of equality 7. division 8. subtraction property of equality what is the missing statement in the proof? scroll down to see the entire proof.