Answer:
a )
,
b ) 
Step-by-step explanation:
This is a nice and short question we have here.
Given that a bag has n counters, and that one counter is blue, respectively the rest is red, if two counters are taken at random there isn't a definite percentage that one of the counters chosen is red or blue, but there is a fractional representation of this.
We could express n ( number of counters ) to form a probability of 2 / n. As you can see, two counters are taken at random over n counters, and thus we derived this fraction.
a ) 
____
Now we have this second part -

Therefore, there are 15 red counters. Hope that helps!
The answer is 652.50
450+45%
Answer:
48,96
Step-by-step explanation:
As we saw it the numbers kept increasing by x2 (or times 2) so the next had to be the same.
peace
<span>What is the edge length of a face-centered cubic unit cell made up of atoms having a radius of 125 pm? </span>393pm
Answer:
isosceles
x=14
Step-by-step explanation:
isosceles because of the two I symbols on the triangle
x+5=2x-9
5+9=2x-x
14=x