To select two students to read the morning announcements, the principal places 5 girls names and 4 boys names in a bag. what is the probability that both students selected to read the morning announcements will be 2 girls?

First let's measure how many ways can be the announcement done.

We have 9 people. So 9 options for first person and 8 option for the second.We get 72 possibilities. Since it doesn't matter a is with b or b is with a the possibilities go down to 36.

Now let's count how many ways we can make 2-girl pair

we can 5 options for the first person and 4 options for second. The same way divide this by 2 we are left with 10 possibilities.

So we got that there are 36 pairs possible.

At least find the probability divide the wanted outcome by the possible numbers of outcomes. 10/36=5/18

Answer 5/18

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

d. vertex

step-by-step explanation: