What number is one thousand more than 6,861

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning