A bag contains 15 white balls and 10 black balls, another contains 20 white balls and 15 white balls. if two balls are drawn without replacement from each bag, find the probability that a)all four are black
b)exactly one of the four are white ​

Write an equation of the line given the two points below (write your equation in slope-intercept form, y=mx+b): (-4, 4) and (6, -4)

Which net represents the pyramid below? meh

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.