∠1+∠2=∠ find the reason

Can you simplify 4/7? 24 points will be awarded!

If lmn=xyz, which congruences are true by cpctc? check all that apply

7.(03.01 lc)which set represents the range of the function shown? {(-1, 5), (2,8), (5, 3), 13, -4)} (5 points){-1, 2, 5, 13){(5, -1), (8, 2), (3,5), (-4, 13)){-4, 3, 5, 8}{-4, -1, 2, 3, 5, 5, 8, 13}