pls help me the tables shows the relationship between a number of movies tickets and cost which expression can be used to determine the constant proportionality? pls for 25 points

The function a represents the cost of manufacturing product a, in hundreds of dollars, and the function b represents the cost of manufacturing product b, in hundreds of dollars. a(t) = 5t + 2 b(t) = 7t - 2t +4 find the expression that describes the total cost of manufacturing both products, a(t) + b(t). a. 7t^2 - 7t + 2 b. 7t^2 + 3 +6 c. 7t^2 + 7t - 6 d. 7t^2 - 3t + 6

An ant travels at a constant rate of 30cm every 2 minutes.at what speed does the ant travel per minute

Apack of gum would be considered a(n) necessity luxury item small ticket item unaccountable expense