The speed-time graph shows the movement of two vehicles on the same route for a period if 90s. The bus moves at a uniform speed of 24 m/s and continues its journey in the same direction as the bus. If the van overtakes the bus after t seconds, find the value of t.

Efficient homemakers ltd. makes canvas wallets and leather wallets as part of a money-making project. for the canvas wallets, they need two yards of canvas and two yards of leather. for the leather wallets, they need four yards of leather and three yards of canvas. their production unit has purchased 44 yards of leather and 40 yards of canvas. let x be the number of leather wallets and y be the number of canvas wallets. draw the graph showing the feasible region to represent the number of the leather and canvas wallets that can be produced.