Huang has a coupon that gives him 20% off all items purchased. he buys 3 shirts that each cost the same amount, and he pays with a $100 bill. which expression represents the amount of change huang should receive? check all that apply.
100 – (0.2(3x))
100 – (0.8(3x))
100 – (1 – 0.2)(3x)
(100 – 1 – 0.2)(x + x + x)
100 – (0.8x + 0.8x + 0.8x)

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

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?