Answer:
7x^2+2x-4
Step-by-step explanation:
a standard form is ax+by=c
5x^2 add 2x^2=7x^2 then -2x but when you have a -10 +6 you get -4 giving you the answer of 7x^2 +2x -4
This isnt something I can do... But draw and label a tape diagram that goes from 0 to 30.
That would be 2 because you can divide both by 2 and get a whole number hope this helps