Rose bought 60 feet of wire for $16.80 she needs 40 more feet. if the unit price is the same, how much will she pay for the extra 40 feet for wire?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

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

Just tell me how to set up the equation.