Pls I need help. At a certain time, a vertical pole 3 m tall casts a 4 m shadow. What is the angle of elevation of the sun? No links.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827

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