The sum of two numbers is 91. The greater number is 7 more than the smaller number. Which equation can be used to solve for the smaller number? x(x + 7) = 91
x(x − 7) = 91
x + (x + 7) = 91
x − (x + 7) = 91

Can (3,5 and square root 34) be sides on a right triangle?

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

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?