Which is greater 9/2 or 4.500

Solve 2x+y=3 x+y=5 in substitution method

What is the value of x in the following equation. -x ^3/2 = -27

1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given