Please help me with this question, its 15 points, have a good night/day

Find the difference (8ab+a+2) - (3ab+6)

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs

An unknown number x is at most 10. which graph best represents all the values of x? number line graph with closed circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the right. number line graph with open circle on 10 and shading to the left. number line graph with closed circle on 10 and shading to the left.