A contractor bought 10.8 ftsquared of sheet metal. She has used 2.3 ftsquared so far and has $136 worth of sheet metal remaining. The equation 10.8xminus2.3xequals136 represents how much sheet metal is remaining and the cost of the remaining amount. How much does sheet metal cost per square foot?

What is the sum of these mixed numbers 4 2/3+ 3 1/9

If each bricks costs and he can only buy one brick how much will it cost him to get the material to put around the outside of his garden?

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).