Alright yall final exams today yall ready to give me some answer

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

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

The following hormone had their receptors in the cell membrane except a-insulin b-tsh c-gh d- cortisol