Which expression is equivalent to 2x2 + (4x - 6x2) + 9 - (6x + 3)?

What is the sum of these mixed numbers 4 2/3+ 3 1/9

Someone which statements are true? check all that apply.

What will be the end result for the taxpayer who filed his federal income tax return using the 1040ez form shown belowa he'll owe $173b he'll receive a refund of $173c he'll owe $3921d he'll receive a refund of $3921