Hooman child#3872 is my discord if anyone wants to call cause i'm bored

Select all of the following expressions that are equal to 2.5.

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

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20