Out of 21 students in a class three seventh are boys and four seventh are girls. how many are girls and how many are boys

The two-way frequency table below shows data on playing a sport and playing a musical instrument for students in a class.

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

What value of x is in the solution set of 4x – 12 s 16 + 8x?