Compare and contrast the solutions of a - 3 = 15 and a - 3 > 15

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

For what value of (y) is 3^3/3^y =1/9

There were 25 students who answered to a survey about sports. four-fifths of them like football. how many students like football?