Two numbers are consecutive multiples of 3. Three times the larger of the numbers is 7/10 of 5 times the smaller. What are the numbers? Please help!

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

If f(x) = 2x + 8 and g(x) = x4, what is (gº)?

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem