How many of you guys forgot most of the math we learned

Add or subtract polynomial : –12qr? +13rq?

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Ab and bc form a right angle at point b. if a= (-3,-1) and b= (4,4) what is the equation of bc?