The equation x squared + y squared − 2x + 2y − 1 = 0 is the general form of the equation of a circle. what is the standard form of the equation? (x − 1)squared - (y − 1)squared = 1 (x − 1)squared + (y + 1)squared = 3 (x + 1)squared + (y − 1)squared = 1 (x − 1)squared + (y + 1)squared = 1

Colby and jaquan are growing bacteria in an experiment in a laboratory. colby starts with 50 bacteria in his culture and the number of bacteria doubles every 2 hours. jaquan starts with 80 of a different type of bacteria that doubles every 3 hours. let x equal number of days. colbys experiment follows the model: a.) y=50*2^x b.) y=50*2^8x c.) y=50*2^12x jaquans experiment follows the model: a.)80*2^x b.)80*2^8x c.)80*2^12x

Nine more than four times a number is the same as one less than twice the number. find the number?

Type the correct answer in each box. spell all the words correctly, and use numerals instead of words for numbers. if necessary, use / for the fraction bar(s).