Which expression is equivalent to (2x^2+3x-4)-(x^2-2x+4)

Find the equation using the point (4,8)

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

What is the value of x? assume that the line is tangent to the circle.