Use rounding to estimate.

1. 2.34 + 1.9 + 5.23
2. 10.39 - 4.28

Determine the difference: 3.2 × 1010 – 1.1 × 1010. write your answer in scientific notation.

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

Which graph represents the same relation is the sa which graph represents the same relation as the set {(-3-2)}