Lawanda put $15 of her paycheck into her savings account. then she spent one-half of what was left on clothes. she paid $24 for a concert ticket and later spent one-half of what was then left on a book. when she got home, she had $14 left. what was the amount of lawanda's paycheck?

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