What is the expression simplified?

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.

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585

What is the answer to the question 5x+2x