The value x=5 is a solution to the system of equations y = 4x - 7 and y = -2x + b , where b is some unknown constant. Determine the value of b

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Given: pqrs is a parallelogram prove: pr and qs bisect each other at t

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