CAN ANYONE HELP ME I WILL MARK AS BRAINLIEST Solve the word problem and Write the statements.
Grade 3 students used three rolls of ribbons measuring 300 metres, 286 metres and 258 metres for dance in primary Concert. Find the total length of ribbons.

In the diagram, the measure of angle 9 is 85° which angle must also measure 85°?

65 8 7 4 5 6 8 4 3 2 1 9 5 6 4 2 1 6 5 1 5 1 3 2 3 5 multiply the third number in the first row by the seventh number in the third row. add this result to the fifth number in the second row. add to this total ten times the fourth number in the third row. subtract the eighth number in the first row from the result.

Solve x+3y=6 and 4x-6y=6 by elimination . show work !