The US postal service began using five-digit zip codes in 1963. every post office was given its own zip code, which ranged from 00601 in Adjuntas, puerto rico, to 99950 in ketchikan, alaska

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

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