Use the graph to write a linear function that relates y to x .

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

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

What number line represents the solution set for the inequality -1/2 greater than or equal to 4