Why are you supposed to leave the slope as a fraction

∠1 and ∠2 are complementary. ∠1=x°∠2=(3x+30)° select from the drop down menu to correctly answer the question. what is the value of x? . a.15 b.25 c.30 d.40 e.55

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.