PLEASE ANSWER ME THIS!!

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.

How many solutions does the nonlinear system of equations graphed bellow have?

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.