Can someone help me with all 5

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.

Find the equation of the line with slope =8 and passing through (6,53) write your equation in the form y=mx+b

What is the best way to answer questions with a x expression in the question. for example 3x + 10x=?