7. What is the y-intercept of a line that passes through the points (1.-7) and point (5,-25)?

1. 2.5
2. -2.5
3. 2

Find the distance between c and d on the number line c=3 and d=11

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

How do i i solve this equation? -18 = x/3 + 3