The correct answer is C! Because 21/2 = 10.5 and 10.5 x 4.5 = 47.25
4 equal sides, 4 right angles, 2 pairs of parallel and opposit sides I think
Answer:
45
Step-by-step explanation:
x + 3x = 180
Combine like terms : 4x = 180
180/4 = 45
-3(-x)-6=-3x+10
-3 -3
(-x)-6=-3x+7
-6 -6
(-x)=-3x+1
i only got this far!! im so sorry!!
