Elena and Jada each make money by helping out their neighbors. Elena babysits. Her earnings are given by the equation y=12x, where x represents
how many hours she works and y represents how much money she earns.
Jada earns $15 per hour mowing her neighbors' lawns. Which equation
below would represent Jada's earnings per hour?
ANSWER ASAP PLEASE AND THANK YOU

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

Use the elimination method to solve the systems of equations.choose the correct ordered pair. 7x+4y=39

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?