An architect's model of a building uses the scale of 1 inch = 2 1/2 feet. If the height of the model is 20 inches, how tall will the actual building be?

Find the sum of 4x^{2} -4+6 and -7^{2} +3x+1

An angle that measures between 90 and 180° is called a(,

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