Assume that 0 < x < pi/2 and 0 < y < pi/2. find the exact value of cos(x - y) if cos x = 3/5 and cos y = 4/5

Acylinder has volume 45π and radius 3. what is it’s height?

The graph of h(x)= |x-10| +6 is shown. on which interval is this graph increasing

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