2.00 - 1.50 = 0.50
0.50 - 1.75 = -1.25
Solution: he owns $1.25
138 x ? = 75
? = 75/138 = 0.544(3sf)
so about 54.35% (2dp) decrease
(5,12,13) is a right triangle and can be constructed.
All the others do not satisfy the triangle inequality, i.e. the sum of two short sides must exceed the long side in order for the triangle to be constructed.
Examples:
2+11<15, so no
3+7<11, so no
4+8<15, so no
but 5+12>13 so yes, it can be constructed.
Paul should use the mode of the poll results to guide his decision.
