Answer:
64%
Step-by-step explanation:
The nickel= 9/25
The copper=16/25
1. Multiply by 4 to get a total of 100
nickel=36/100
copper= 64/100
Sorry if it is wrong but i hope i was right
36 should be added to both sides because 12/2= 6 then you square 6 to get 36 and that should be it.
You can factor a parabola by finding its roots: if

has roots
, then you have the following factorization:

In order to find the roots, you can use the usual formula

In the first example, this formula leads to

So, you can factor

The same goes for the second parabola.
As for the third exercise, simply plug the values asking

you get

Add 3 to both sides:

Divide both sides by 1.5:

10 + 8 + 0.6 + 0.04 = 18.64
The probability that 1 girl and 2 boys will be selected is given by:

The correct answer choice is B. 1/2.