One grade of tea worth $3.90 per pound is to be mixed with another grade worth $2 per pound to make 20 pounds that will sell for $2.76 per pound. How much (in lb) of each grade of tea must be used?

lb

$3.90 tea= lb

$2 tea= lb

Asap! i'm not good math and i'm lost.

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

Are the corresponding angles congruent? explain why or why not.