Which equation represents a circle with a center at (-4,9) and a diameter of 10 units?
(x - 9)2 + (y + 4)2 = 25
(x + 4)2 + (y - 9)2 = 25
(x - 9)2 + (y + 4)2 = 100
(x + 4)2 + (y – 9)2 = 100

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents

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

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?