Are the ratio 2/3 and 5/18 a form of proportion

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

Tom drove 206 miles in 3.9 hours. estimate his average speed.

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