Molly went shopping to buy jewelry. All of the pairs of earrings, e, cost $15.50 and the necklaces, n, cost $40.50. If she spends $158.50 and buys 7 items, how many necklaces and pairs of earrings did she buy? Enter a system of equations to represent the situation, then solve the system. Justify your answer.

The system of equations is blank and blank

Molly bought
blank pairs of earrings and
blank necklaces.

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