Anna puts some blue counters and some red counters into an empty box.
The ratio of the number of blue
counters to the number of red counters
is 1:4.
She then takes at random 2 counters
from the box, without replacement.
The probability that she takes 2 blue
counters is
3
80
How many blue counters did Kelly put
into the box?

29.5977692753

step-by-step explanation:

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.