Which is the correct answer?
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Find the distance between (7,-6) and (-3,-9)

Siri can type 90 words in 40 minutes about how many words would you expect her to type in 10 minutes at this rate

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