-7y + 2 = -75
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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

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?