Some answer seriously pls

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

At a local museum, the total price for one adult and one child is $11. mrs. smith paid for herself and her three children. she spent $19. record the system of equations to be solved and then find the price of an adult and child ticket using either elimination or substitution.