The answer is three significant figures. The 1 and the 7 are both significant, because they are non-zero quantities. This is where significant figures gets a little more complicated, because if a zero is used as a placeholder (i.e. 0.00027 cm) then it is insignificant. But in the case above, the zero isn't being used as a placeholder, and thus, is significant.
Let x = wristbands y = headbands We then have the following inequations: 2x + 3y> = 50 x> = 5 The graph that represents the solution for this system of inequations is shown in the attached image. The set of solutions is the shaded region.