True or False: 2(5m-n) is in simplified form?

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows.statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.

Find two numbers if their ratio is 4: 7 and their difference is 123.

Enter the amplitude of the function. f(x)=3cosx