Answer:
length of shorter side = 6.5 cm
Explanation:
the upper sides are congruent and the lower sides are congruent.
given perimeter = 33
then sum the sides and equate to 33
2(3x - 1) + 2(2x + 5) = 33 ← distribute parenthesis and simplify left side
6x - 2 + 4x + 10 = 33
10x + 8 = 33 ( subtract 8 from both sides )
10x = 25 ( divide both sides by 10 )
x = 2.5
then
shorter side = 3x - 1 = 3(2.5) - 1 = 7.5 - 1 = 6.5 cm