Please someone help me with is. Thank you so much

Ben bowled 124 and 188 in his first two games. what must he bowl in his third game to have an average of at least 160?

What is the result of the following division?

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