A bag of marbles had 20 red marbles and the rest were black. For a game, 4/5 of the 20 red marbles were chosen, and 24 of the black marbles were also chosen. How many black marbles were in the bag before the game?

step-by-step explanation:

y-y1=4(x-x1)

step-by-step explanation:

this is point-slope form since you only have 4 as the slope it goes in place of m

hope this : )

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50

51

step-by-step explanation:

73-22=51 the   mass number minus the amount of protons gives you the amount of neutrons